Question

The area of the semicircle is $200m^2$. What is the radius of the semicircle?

• A. $10m$
• B. $11m$
• C. $12m$
• D. $13m$

Answer 1

The correct option is B $11m$

Area of a semicircle $=\frac{1}{2}\pi r^2$
$200=\frac{1}{2}\pi r^2$
$400=\pi r^2$
$r^2=127.38m^2$
$r\approx 11$ $m$