Question

A cylinder has a radius and height of 1 cm and 7 cm respectively. Its curved surface area will be equal to

• A. 22 cm²
• B. 44 cm²
• C. 56 cm²
• D. 72 cm²

Answer 1

The correct option is B 44 cm²

Curved surface area of a cylinder of radius 'r' and height 'h' is 2$\pi$rh.
Here, r = 1 cm and h = 7 cm.
= $2\times \frac{22}{7}$ x 1 x 7
= 2 x 22
= 44 sq. cm