A right circular cone is 3.6 cm high and the radius of its base is 1.6 cm. It is melted and recast into a right cylinder cone with radius of its base as 1.2 cm, find the height.

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.

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.

Find the surface area of a cylinder whose- Radius of the base is 4m and height 5.6m.

Radius of a wheel is 28cm, what is its perimeter.

A solid consisting of a right circular cone of height 120cm and radius 60cm standing on a hemisphere of radius 60cm is placed upright in a right circular cylinder full of water such that it touches the bottom.Find the volume of water left in the cylinder if the radius of the cylinder is 60cm and its height is 180cm.

A cylindrical tub of radius 5 cm and length 9.8 cm is full of water. A solid in the form of a right circular cone mounted on a hemisphere is immersed into the tub. If the radius of the hemisphere is 3.5 cm and height of the cone outside the hemisphere is 5 cm, find the volume of water left in the tub.

A solid cylinder of diameter 12 cm and height 15 cm is melted and recast into 12 toys in the shape of a right circular cone mounted on a hemisphere. Find the radius of the hemisphere and total height of the toy, if the height of the conical part is 3 times its radius.

A metallic sphere of radius 10.5cm is melted and then recast into small cones each of radius 3.5cm and height 3cm.The number of such cone is__-

A cylindrical tub of radius 5 cm and length 9.8 cm is full of water. A solid is in the form of a right circular cone mounted on a hemisphere is immersed into the tub. If the radius of the hemisphere is 3.5 cm and the height of the cone outside the hemisphere is 5 cm, find the volume of water left on the tub. (Use pi = 22/7 )

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.