A hollow copper pipe of inner radius 3 cm and outer radius 4cm is melted and changed into a solid right circular cylinder of the same !engh as that of the pipe. Find the area of the cross section of the solid cylinder.

A hollow copper pipe of inner radius 3 cm and outer radius 4cm is melt

1.	A hollow copper pipe of inner radius 3 cm and outer radius 4cm is melted and changed into a solid right circular cylinder of the same !engh as that of the pipe. Find the area of the cross section of the solid cylinder.
Answer» A hollow copper pipe of inner radius 3 cm and outer radius 4cm is melted and changed into a solid right circular cylinder of the same !engh as that of the pipe. Find the area of the cross section of the solid cylinder.