Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 9 Answered

The curved surface area of a solid cylinder is 880 cm2 and its height is 20 cm. Find the area of the base of the cylinder.
Asked by Topperlearning User | 12 Oct, 2017, 09:06: AM
answered-by-expert Expert Answer

Given: Curved surface area(S) = 880 cm2, height (h) =20 cm

Area of the base of the cylinder = πr squared


begin mathsize 12px style straight S space equals space 880 space cm squared 2 πrh space equals space 880 straight r space equals space fraction numerator 880 cross times 7 over denominator 2 cross times 22 cross times 20 end fraction straight r space equals space 7 space cm end style


begin mathsize 12px style Area space of space the space circle space equals space πr squared space equals 22 over 7 cross times 7 cross times 7 space equals space 154 space cm squared end style

Answered by | 12 Oct, 2017, 11:06: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 9 - Maths
the total surface area of hollow metal cylinder open at both ends of a internal radius 8cm and height 10cm is 388πcm²(ignoring the area of rims ).find the thickness of the metal in the cylinder
Asked by titub5397 | 18 Dec, 2023, 09:05: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
To find formula for the curved serface area of right circullar cylender expermentally
Asked by lalchandkundara17 | 30 Dec, 2022, 08:44: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
What is the volume of a right circular cylinder whose base area is 606cm² and whose height is 2m
Asked by devanshuraval240 | 07 Nov, 2020, 09:34: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
The radius of a right circular cylinder with curved surface area of 440 cm2 and an altitude of 5 cm is
Asked by swatipuspapatel | 17 Oct, 2020, 07:50: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
the radius of sphere is 2r, then its volume will be?
question image
Asked by taragiunnati | 02 Jun, 2020, 08:39: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
a cylindrical vessel filled with water has internal diameter 7.8cm and height 28cm. it's entire water is put in a rectangular tube whose base is a square of side 26cm.find the height of water in tube?
Asked by shivampandey2248 | 20 Nov, 2019, 12:59: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
find the diameter of a cylinder whose height is 5cm and numerical value of volume is equal to numerical alue of curved surface area  
Asked by tanmayambika | 08 Jun, 2019, 03:03: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
A hollow cylindrical tube, open at both ends is made of iron 1 cm thick. If the external diameter is 14 cm and the length of tube is 70 cm, Find the cost of painting its inner surface at the rate of Rs. 4 per cm2.
Asked by Topperlearning User | 12 Oct, 2017, 08:09: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
The diameter of a roller 1 m long is 56 cm. If it takes 200 revolutions to level a playground, find the cost of levelling the playground at the rate of 50 paisa per m2.
Asked by Topperlearning User | 12 Oct, 2017, 07:56: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
Find the lateral surface area (curved surface area) of a hollow cylinder open at the ends of length is 14 cm, the external diameter is 10 cm and the thickness is 2 cm.
Asked by Topperlearning User | 12 Oct, 2017, 08:11: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×