Question

The diameter of the base of a right circular cylinder is 20 m and its height is 42 m. Find its curved surface area.

• A. 2210 $m^2$
• B. 1320 $m^2$
• C. 2640 $m^2$
• D. 5386 $m^2$

Answer 1

The correct option is C 2640 $m^2$

Diameter, $d=20m$
$\therefore$ Radius, $r=10m$
Height, $h=42m$

Curved surface area of cylinder $=2\pi rh$
$=2\times \frac{22}{7}\times 10\times 42=2\times 22\times 10\times 6=44\times 60=2640m^2$