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.

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

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 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 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.

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 hemispherical bowl of radius 9 cm is full of liquid. The liquid is to be filled into cylindrical shaped small bottles, each of diameter 3 cm and height 4 cm. How many bottles are needed to empty the bowl.

If three metallic spheres of radii 6cm,8cm and 10cm are melted to form a single sphere then the diameter of the sphere is

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.

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.

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.