Question

If the radius of a circle is $21cm$, what will be its area?
$(\text{Take}\pi =\frac{22}{7})$

• A. $1386c{m}^2$
• B. $1286c{m}^2$
• C. $1186c{m}^2$
• D. $1346c{m}^2$

Answer 1

The correct option is A $1386c{m}^2$

Given: Radius $=21cm$

Area of circle $=\pi r^2$

$=\frac{22}{7}\times 21\times 21$

$=22\times 3\times 21$

$=66\times 21$

$=1386c{m}^2$