Question

What is the formula for the curved surface area of a rectangular circular cylinder?

(a) 2πr^2h

(b) 2πrh

(c) 2π(r + h)

(d) 2π(rh)

I got this question during an online exam.

The above asked question is from Surface Area and Volume of Different Solid Shapes topic in portion Surface Area and Volumes of Mathematics – Class 10

Answer 1

The correct option is (b) 2πrh

To elaborate: The curved surface area of a rectangular circular cylinder = 2πrh

Where ‘r’ is the radius of the base and ‘h’ is the height of the right circular cylinder.