Question

Find the diameters of circles having the following areas.
$86\frac{5}{8}c{m}^2$

Answer 1

Given area of circle = $86\frac{5}{8}=\frac{693}{8}c{m}^2$

now area of circle = $\pi r^2=\frac{693}{8}$

$r^2=\frac{693}{8\times 3.14}=27.58$

$r=5.25cm$

Then Diameter of circle = 2r = 10.50 cm