A cylindrical roller 2.5 m in length, 1.75 m in radius when rolled on a road was found to cover the area of 5500 m2. How many revolutions did it make?
A school provides milk to the students daily in a cylindrical glasses of diameter 7 cm. If the glass is filled with milk upto an height of 12 cm, find how many litres of milk is needed to serve 1600 students
Two solid spheres made of the same metal have weights 5920 g and 740 g, respectively. Determine the radius of the larger sphere, if the diameter of the smaller one is 5 cm
How many square metres of canvas is required for a conical tent whose height is 3.5 m and the radius of the base is 12 m?
Find the amount of water displaced by a solid spherical ball of diameter 4.2 cm, when it is completely immersed in water
A storage tank is in the form of a cube. When it is full of water, the volume of water is 15.625 m3 .If the present depth of water is 1.3 m, find the volume of water already used from the tank.
Metal spheres, each of radius 2 cm, are packed into a rectangular box of internal dimensions 16 cm × 8 cm × 8 cm. When 16 spheres are packed the box is filled with preservative liquid. Find the volume of this liquid. Give your answer to the nearest integer. [Use 3.14 π= ]
The radius of a sphere is increased by 10%. Prove that the volume will be increased by 33.1% approximately
The surface area of a sphere of radius 5 cm is five times the area of the curved surface of a cone of radius 4 cm. Find the height and the volume of the cone (taking π = 22/7 ).
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