# Surface Area Of A Cube And Cuboid Free Doubts and Solutions

### CBSE - IX - Mathematics - Surface Areas and Volumes

## Q.no 16

**538049503243584**28th February 2018, 5:15 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## How many m2 of tin would be required to line the inside of a rectangular tank on the sides and bottom if the inside dimensions of the tank are 8 m × 5 m × 4 m.?

**Topperlearning User**23rd August 2017, 1:13 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## The floor of a hall with square base has a perimeter 200 m. If the cost of painting the four walls at the rate of Rs 10 per m2 is Rs 20000, find the height of the hall.

**Topperlearning User**23rd August 2017, 1:12 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## The paint in a certain container is sufficient to paint an area equal to 74295 cm2. How many bricks of dimensions 19.5 cm × 11 cm × 6.5 cm can be painted out of this container?

**Topperlearning User**23rd August 2017, 1:11 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## Find the cost of painting the four walls and the base of a rectangular tank of dimensions 3 m × 2 m × 2.5 m at the rate of Rs 4.50 per m2.

**Topperlearning User**23rd August 2017, 1:11 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## A wooden box of dimensions 1.5 m × 1.25 m × 0.65 m and open at the top is to be made. Determine the cost of wood required for it, if 1 m2 of wood costs Rs 20.

**Topperlearning User**23rd August 2017, 1:10 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## A cubical water tank with lid has each edge 2 m long. If the cost of the tiles is Rs 240 per dozen. Calculate the amount spent to cover the outer surface of the tank excluding the base, with square tiles of side 50 cm.

**Topperlearning User**23rd August 2017, 1:07 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## Lata wants to cover her almirah with a coloured paper. If the almirah has length, breadth and height as 1.5 m, 1 m and 5 m respectively. Find the number of square sheets of paper of side 1 m she requires.

**Topperlearning User**23rd August 2017, 1:05 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## The floor of a rectangular room has a perimeter 100 m and area of its four walls is 1000 m2. The height of the room is

**Topperlearning User**23rd August 2017, 1:04 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## If a workman can paint at the rate of 20 m2 an hour, find the time required to paint the cuboidal box of dimensions 20 m × 26 m × 10 m.

**Topperlearning User**23rd August 2017, 1:02 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## Five cubes each of edge 6 cm are joined end to end. Find the surface area of the resulting cuboid.

**Topperlearning User**23rd August 2017, 1:00 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## A concrete pillar 15 m high has a cross section which is square of side 3 m. Find the cost of painting its top and four walls at the rate of Rs 4 per m2.

**Topperlearning User**23rd August 2017, 12:58 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## Find the cost of sheet required for making a cuboidal box measuring 3 m × 5 m × 3.5 m, if 1 m2 costs Rs 21.

**Topperlearning User**23rd August 2017, 12:57 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## Find the cost of painting an open rectangular tank of dimensions 4 m × 2.5 m × 5 m at the rate of Rs 5.50 per m2.

**Topperlearning User**23rd August 2017, 12:56 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## Find the cost of painting the four walls and ceiling of a room at the rate of Rs 14 per m2, if perimeter of the base with equal sides is 80 m and height of the room is 9.5 m.

**Topperlearning User**23rd August 2017, 12:55 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## A room is 20 m long, 18 m broad and 11 m high; it has a door 4 m by 8 m. Find the cost of papering its wall excluding the door at the rate of Rs 4 per m2.

**Topperlearning User**23rd August 2017, 12:52 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## A cube whose edge 15cm is melted to cast a cylinder of radius 14 cm.find its height

**Priya**14th March 2017, 10:48 AM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## <div>The answer of one of your question is wrong . The question follows as :</div> <div>The area of three adjacent faces of cuboid is a,b,c and volume of cuboid is V then V= ?</div> <div>the answer given by your site is V=abc.</div> <div>The correct answer is V=<img class="Wirisformula" src="https://images.topperlearning.com/topper/tinymce/integration/showimage.php?formula=f6e8fff7716cad3dd2a5cf5d3a73afff.png" alt="square root of a b c end root" align="middle" /> </div> <div>Please clarify.</div>

**Samarth**2nd June 2016, 7:44 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## A card board sheet is of rectangular shape with dimesnsions 48m * 36m.From each of its corners,a square is cut off so as to make an open box.If the side of the square is 8m,find the volume and lateral surface area of the box.

**ommishra763**24th March 2016, 9:49 AM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## How many spherical bullets can be made out of a solid cube of lead, whose edge measures 40 m, each bullet being 6 m in diameter.

**mkmishra101**9th March 2016, 2:37 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## The surface area of a cube is 384 cm². Find the edge of the cube.

**mkmishra101**3rd March 2016, 12:05 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## the " caring old people organisation" needs money to build the old age home which required 164000 bricks. bricks measure 10cm*8cm*4cm and cost of brick depends on its volume at the rate of Rs 1 per 100 cm^{3 }. it required 4 cylindrical cans of paint of radius 14cm and height 30cm. the cost of paint is Rs 1 per 20cm^{3}. how much money is required by organization ?if "company gives money to the organization " then, what common value is depicted by a company and the organization?

^{3 }. it required 4 cylindrical cans of paint of radius 14cm and height 30cm. the cost of paint is Rs 1 per 20cm

^{3}. how much money is required by organization ?if "company gives money to the organization " then, what common value is depicted by a company and the organization?

**krishan_5**3rd March 2016, 8:07 AM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## The capacity of a cubical tank is 60000L of water. Find the breadth of the tank, if it's length and depth are respectively 2.5 m and 5m.

**mkmishra101**2nd March 2016, 7:52 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## <div>A sphere and a cube have the same surface area.Show that the ratio of the volume of the sphere to that of the cube is <img class="Wirisformula" src="https://images.topperlearning.com/topper/tinymce/integration/showimage.php?formula=992b87853b0293b822b193d2b73150c1.png" alt="square root of 6 space colon square root of space straight pi end root" align="middle" /></div>

**Divyaa**24th February 2016, 6:43 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## A room is half as long as it is broad. The cost of carpeting the room at Rs 3.25 m2 is Rs 175.50 and the cost of preparing the walls at Rs 1.40 per m2 is Rs 240.80. If 1 door and 2 windows occupy 8 m2, then find the dimensions of the room ?

**nisha_vini29**16th February 2016, 8:46 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## The cost of preparing the walls of a room 12 m long @ Rs 1.35 m2 is Rs 340.20 and the cost of matting the floor at 85 p per m2 is Rs 91.80 , find the height of the room ?

**nisha_vini29**16th February 2016, 12:00 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## The external dimensions of a wooden box are 12dm 6dm 8dm . If the thickness of the wood is 1dm then find out its inner surface area .

**suprakash**17th January 2016, 12:07 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## CAN I GET ATLEAST 5 QUESTIONS BASED ON THE BELOW CRITERIA:
EACH SIDE OF A CUBE IS INCREASED BY 50%. FIND THE PERCENTAGE INCREASE IN THE SURFACE AREA OF THE CUBE.

**mishra.25.reena**12th October 2015, 4:11 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## The cost of painting the walls of the room 12 m long at the rate of Rs 1.35 per sq. m is Rs 340.20. And the cost of painting the floor at the rate of .85 paise per sq. m is rs 91.80. find the height of the room. Please also give the suitable diagram. Please give fast as tomorrow is my maths exam.

**vatsalchoudhary41**13th March 2015, 9:10 AM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## Respected Sir/Madam,
When we double each side of cube then why does its volume becomes 8 times. Please explain..

**Varsneya Srinivas**2nd March 2015, 10:41 AM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## <div>Respected sir/madam,</div> <div>You have mentioned the length of diagonal of a cube = <img class="Wirisformula" src="https://images.topperlearning.com/topper/tinymce/integration/showimage.php?formula=a8f76afd64985d9fd313e6fd7f538490.png" alt="square root of 3 a end root " align="middle" /></div> <div>Can you explain everything about this formula with the help of a diagram?</div>

**Varsneya Srinivas**7th February 2015, 9:20 AM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## <div>Respected Sir/Madam,</div> <div>You have said in your video lessons that Diagonal of a cuboid = <img class="Wirisformula" src="https://images.topperlearning.com/topper/tinymce/integration/showimage.php?formula=80a24ec600446f7342ae2dbfb762beb8.png" alt="square root of l squared plus space b squared plus space h squared end root" align="middle" /> </div> <div>Can you explain everything about this formula with the help of a diagram ?</div>

**Varsneya Srinivas**7th February 2015, 9:07 AM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## What is the difference between lateral surface area and curved surface area

**gaurav72001**1st February 2015, 6:25 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## each edge of a cube is increased by 20% . what is the percentage increase in the surface area of the cube?

**araima2001**18th January 2015, 11:18 AM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## Two cubes of side 6 cm each are joined end to end. Find the surface area of the resultant cuboid.

**Topperlearning User**3rd December 2014, 8:57 AM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## Harry has built a cubical water tank with lid for his house, with each outer edge 1.5 m long. He gets the outer surface of the tank excluding the base, covered with square tiles of sides 25 cm. Find how much he would spend for the tiles, if the cost of the tiles if Rs. 36 per dozen.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## The length, breadth and height of a room are 5 m, 4m and 3 m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of Rs 7.50 per m2.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## Find the cost of white washing the four walls of a room with dimensions 5 m 4m 3m at the rate of Rs. 12/m2.

**Topperlearning User**3rd April 2014, 12:35 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## A man built a cubical water tank with lid for his house, with each outer edge 1.5 m long. He gets the outer surface of tank excluding the base covered with square tiles of side 25 cm. Find how much he would spend for the tiles, if cost of tiles is Rs. 480 per dozen.

**Topperlearning User**12th March 2014, 9:37 AM

### CBSE - IX - Mathematics - Surface Areas and Volumes

## The paint in a certain container is sufficient to paint an area equal to 9.375 m2. How many bricks of dimension 22.5 cm 10 cm7.5 cm can be painted out of this container?

**Topperlearning User**21st February 2014, 12:42 PM

### CBSE - IX - Mathematics - Surface Areas and Volumes

**Topperlearning User**21st February 2014, 10:57 AM