Question

What solid is generated when a rectangle is rotated about a line.? a)rectangular pyramid b)cylinder c) rectangular prism d) cone

Answer 1

I believe it is a cylinder.

Answer 2

A solid is a three-dimensional figure obtained by rotating a two-dimensional figure around a straight line .

Different two dimensional figure give different three dimensional figure .

A cone is formed by rotating a right triangle about any line,a sphere is formed by rotating a circle .

If we look at the figure formed by rotating a rectangle around a line the three dimensional figure formed is a cylinder.

The answer is option b)cylinder .