Surface Areas a...

A solid metal ball of radius 8 cm is melted and cast into smaller balls, each of radius 2 cm. The number of such balls is:

How many coins that are $$2$$mm thick and $$1.5$$cm in diameter should be melted in order to form a right circular cylinder having a base diameter $$6$$cm and height $$8$$cm?

Two cubes each of side $$12 cm,$$ are joined end to end .the surface area of the resulting cuboid is :

The height of a cone and the radius of its base are respectively 9 and 3 cm. The cone is cut by a plane parallel to its base soas to divide it into two parts. The volume of frustum of cone is $$44{ cm }^{ 3 }$$, then the radius of upper circular of frustum is $$\left\{ Use\  \pi =\dfrac { 22 }{ 7 }  \right\} $$.

The number of iron of length $$21\ m$$ and diameter $$4\ cm$$ each that can be made by recasting $$2.64$$ cubic meters of iron is :

The diameter of a metallic sphere is $$6 cm$$. It was melted to make a wire of diameter $$4 mm$$. Find the length of the wire.

Two cubes have their volumes in the ratio $$1:27$$. The ratio of their surface areas is 

Three cubes of metal whose edges are $$6\ cm,\ 8\ cm$$, and $$10\ cm$$ respectively are melted from a single cube. The edge of the new cube is

The diameters of the two circular ends of the bucket are $$44 cm$$ and $$24 cm$$. The height of bucket is $$35 cm$$. The capacity of bucket is

A surahi is the combination of