Marbles of diameter 1.4 cm are dropped into a cylindrical beaker of diameter 7 cm containing some water. What is the number of marbles that should be dropped into the beaker so that the water level rises by 5.6 cm?
A hollow sphere of internal and external diameter 4 cm and 8 cm respectively is melted into a cone of base diameter 8 cm. Find the height of the cone.
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A solid cylinder has height 12 cm and diameter 10 cm. A conical cavity of same height and same diameter is hollowed out. What is the total surface area of the remaining solid?
The surface area of the cylinder is 2992 cm2 and its height is 20 cm, what is the diameter of the cylinder?
The curved surface area of a cylindrical pillar is 264 m2 and its volume is 924 m3. What is the height of the pillar?
A solid iron hemisphere is melted and a number of solid iron balls of equal size are made. The radius of each ball is one-fourth the radius of the hemisphere. What are the number of balls that can be made?
A solid sphere of copper of radius 10.5 cm is melted and right cones of radius 3.5 cm and height 3 cm are made from the material. What is the number of cones made?
The weight of a metallic spherical shell is 11.176 kg. If the inner radius of the cell is 6 cm. 1 cm3 of the metal weights 21 g then what is the thickness of the shell?
The ratio of the volumes of two spheres is 27 : 8. Find the ratio of their surface areas.
The surface area of a sphere is 616 cm2, what is the diameter of the sphere?
13 videos|44 docs|187 tests
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13 videos|44 docs|187 tests
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