Question

A circle of area 314cm² is inscribed in a square.what is perimeter of yhe square?

Answer 1

area of circle
$\pi \: r { }^{2}$
therefore
$\pi \: r {}^{2}$
=314
100/314*314=r^2
r= 10
dia. = 20cm
perimeter of sq. = 4*20= 80cm^2