Question

Find the surface area of a sphere of radius $10.5$ cm.

• A. $1386{cm}^2$
• B. $1836c{m}^2$
• C. $1368c{m}^2$
• D. $1683c{m}^2$

Answer 1

The correct option is A $1386{cm}^2$

Given, radius $r=10.5$ cm.

We know, the surface area of a sphere of radius $r$ $=4\pi r^2$

$=4\times \frac{22}{7}\times 10.5\times 10.5$

$=1386{cm}^2$.

Therefore, option $A$ is correct.