Question

Find the total surface area of hemisphere of radius 7 cm.(Take $\pi$ = $\frac{22}{7}$ )

• A. 100$c{m}^2$
• B. 210$c{m}^2$
• C. 462$c{m}^2$
• D. 364$c{m}^2$

Answer 1

The correct option is C

462$c{m}^2$

Total surface of hemisphere of radius r

$=3\pi$$r^2$

$=3\times \frac{22}{7}\times 7\times 7$

$=462c{m}^2$