Question

Match the following for a cylinder of radius 7 cm and height 14 cm.

• A. 616 $c{m}^2$
• B. 924 $c{m}^2$
• C. 2156 $c{m}^3$

Answer 1

Curved surface area of a cylinder is given by $2\pi rh$
= 2$\times \frac{22}{7}$$\times 7\times 14=616c{m}^2$

Total surface area of the cylinder is given by $2\pi$rh + $2\pi r^2$
= 2$\times \frac{22}{7}\times 7\times 14+2\times \frac{22}{7}\times 7^2$
= 616 + 308
= 924 $c{m}^2$

Volume = $\pi r^{2}h$
Volume = $\frac{22}{7}\times 7\times 7\times 14$
Volume = 2156 $c{m}^3$