The diameter of sphere is 42 cm. If it is melted and drawn into cylindrical wire of 28 cm diameter, find the length of wire.

The diameter of a sphere is 6 cm.It is melted and drawn into a wire of diameter 2 mm.The length of the wire is__

A metallic sphere of radius 4.2 cm is melted and recast into the shape of a cylinder of radius 6 cm.Find the height of the cylinder.

A solid metallic sphere of diameter 21 cm is melted and recast into a number of smaller cones each of diameter 7 cm and height 3 cm. Find the.number of cones so formed

If the length of the diagonals of a rhombus are 18 cm and 24cm. then find the length of sides.

A solid metallic sphere of diameter 21 cm is melted and recast into a number of smaller cones, each of diameter 3.5 cm and height 3 cm. Find the number of cones so formed.

The internal and external radii of a hollow sphere are 3 cm and 5 cm respectively. The sphere is melted to form a solid cylinder of height 2 2/3cm . Find the diameter and the curved surface area of the cylinder.

If the surface area of a sphere is 5544cm^2 .Find its diameter.

An oil funnel made of tin sheet consists of a 10cm long cylindrical portion attached to a frustum of a cone.If the total height is 22cm,diameter of the cylindrical portion is 8 cm and the diameter of the top of the funnel is 18 cm,find thev area of the tin sheet required to made the funnel(seeFig.13.25).

Three spheres of radius 1 cm, 6 cm and 8 cm are melted and recast into a single solid sphere. Find the radius of new sphere.

The diameter of a wheel is 28 cm.How many times will the wheel move to cover a distance of 352. m? (pi=22/7)