The length of a cold storage is double its breadth. Its height is 3m. The areas of its four  walls is 108m². Find its volume.

The diameter of a garden roller is 1.4m and it is 2m long. How much area will it cover in 5 revolutions?  (Take Π=22/7)

Volume of hollow hemispherical shell of  radii R and r is equal to

If height of a cone is tripled and radius is doubled then its volume will become ----- times.

A cubical block of side 7cm is surrounded by a hemisphere. What is the greatest diameter the hemisphere can have? Find the surface area of the solid.

A hemisphere of lead of radius 8cm is cast into a right circular cone of base radius 6cm. Determine the height of the cone.

Three sphere of radii 3cm, 4cm and 5cm are melted to form a new sphere. Then, the radius of the new sphere is

The diameter of a copper sphere is 6cm. The sphere is melted and is drawn into a long wire of uniform circular cross-section. If the length of the wire is 36cm, find its radius.

A cone of height 15cm and base diameter 30cm is curved onto a wooden sphere of radius 15cm. Then the percentage of wasted wood is

A solid sphere of radius 3cm is melted and then recast into small spherical balls each of diameter 0.6cm. Find the number of small balls thus obtained.