Question

If a wire of length $36$cm36cm is bent in the form of a semicircle, what is the radius (in $100$cm) of the semicircle?

Answer 1

$\frac{2\pi r}{2}=36cm$

$\pi r=36$

$r=\frac{36}{\pi }$

$r=\frac{36}{\pi }cm$

$r=\frac{36}{3.14}$

$=11.47cm$