Question

The height of a cylinder is 7cm and radius is 10cm. Then its curved surface area is ___________.

• A. 440cm${}^2$
• B. 220cm${}^2$
• C. 44cm${}^2$
• D. None of the above

Answer 1

The correct option is A 440cm${}^2$

The curved surface area of a cylinder with height 'h' and radius 'r' is $2\mathrm{\pi rh}$.
curved surface area = $2\times \frac{22}{7}\times 7\times 10$ = 440cm${}^2$