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1.how will the side of cube=radius of sphere 2.the radii of internal and external surfaces of a metallic shell are 3cm and 5cm, it is melted and recast in to solid right circular cylinder of height 32/3.find the diameter of base of cylinder 3.how many spherical lead shots each 4.2 cm in diameter can be obtained from a rectangular solid of leadwith dimensions 66*42*21 cm 4.a solid cylinder of diameter 12 cm and h=15 cm is melted and recasted to 12 toys in the shape of a cone mounted on a hemisphere.find the radius of the hemisphere and total h of the toy if h of cone is 3 times its radius
Asked by swetha | 01 Jan, 2014, 02:06: PM
answered-by-expert Expert Answer
 
Answered by Vimala Ramamurthy | 01 Jan, 2014, 05:42: PM

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CBSE 10 - Maths
what is cone surface area
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CBSE 10 - Maths
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CBSE 10 - Maths
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CBSE 10 - Maths
A rocket is in the form of circular closed at the ler end and a cone of same radius is attached to the top.The radius of the clylinder is 2.5m ,it's height is 21m and the slant height of the cone is 8m Find the T.S.A of rocket
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CBSE 10 - Maths
a wooden toy rocket is in the shape of cone mounted on a cylinder. The height of the entire rocket is 15 cm, while the height of the conical part is 4 cm. The base of the conical portion has a diameter of 6 cm, while the base diameter of the cylindrical portion is 4 cm. If the conicle portion is painted green and the cylindrical portion is painted blue, find the area of the rocket. (use π=3.14)
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CBSE 10 - Maths
A golf ball is spherical with about 300 - 500 dimples that help increase its velocity while in play. Golf balls are traditionally white but available in colours also. In the given figure, a golf ball has diameter 4-2 cm and the surface has 315 dimples (hemi-spherical) of radius 2 mm. Based on the above, answer the following questions: (i) Find the surface area of one such dimple. (ii) Find the volume of the material dug out to make one dimple. Find the total surface area exposed to the surroundings.
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CBSE 10 - Maths
If radius of the base of cone is 7 cm and height is 24 cm, then find its slant height. (A) 23 cm  (B) 26 cm  (C) 31 cm  D) 25 cm
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CBSE 10 - Maths
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CBSE 10 - Maths
3. A glass cylinder with radius 10 cm has water to a height of 9 cm. A metal cube of 8 cm edge is immersed in it completely. Calculate the height by which water will rise in the cylinder. Use =22/7
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CBSE 10 - Maths
A conical tank with base radius 20 cm and height 40 cm is initially filled with water. Water drains through a small round hole at the bottom with a diameter of 1cm. Find an expression for the height of water in the tank at time t  
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