Question

Which of the following can be used to obtain a cylinder?

• A. Rotating a rectangle about its side
• B. Stacking circles of same radius
• C. Rotating a right angled triangle by its hypotenuse
• D. Both (a) and (b).

Answer 1

The correct option is D Both (a) and (b).

A cylinder can be obtained by stacking circles on top of each other

A cylinder can also be obtained by rotating a rectangle about a side.