The radius of a metallic sphere is 9 cm. It was melted to make a wire of diameter 4 mm. Find the length of the wire.

The diameter of iron sphere is 6 cm. It is melted and drawn into a wire having diameter of the cross section as 0.2 cm. Find the length of the wire.

If the radius of a sphere is equal to the diameter of a hemisphere. Find the ratio of volume of sphere to that of the hemisphere.

Altitude on the hypotenuse of a right angle triangle divides it in two parts of length 4 cm and 9 cm. Find the length of the altitude. a) 9cm b) 4cm c) 6cm d) 18cm

A solid metallic cone of radius 2 cm and height 8 cm is melted into a sphere. Find the radius of sphere.

Two uniform wires of a the same material are vibrating under the same tension. If the first overtone of the first wire is equal to the second overtone of the second wire and radius of the first wire is twice the radius of the second wire, then the ratio of the lengths of the first wire to second wire is

The diameter and thickness of a hollow metallic sphere are 12 cm and 0.01 m respectively. The density of the metal is 8.88 gm per cm^3 . Find the outer surface area and mass of the sphere.

How much iron is needed to make a rod of length 90 cm and diameter 1.4 cm ?

A wire gets stretched by 4 mm due to a certain load. If the same load is applied to a wire of the same material with half length and double the diameter of the first wire. What will be the change in its length.

A wire gets stretched by 4mm due to a certain load. If the same load is applied to a wire of same material with half the length and double the diameter of the first wire? What will be the change in its length?

The stress in a wire of diameter 2 mm, if a load of 100 g is applied to a wire, is