Question

If the area of the shaded region given is 39.47cm square. Find radius of the circles.

Answer 1

$hey \: mate \\ here \: is \: your \: answer \\ \\ the \: area \: of \: a \: shaded\: region\: of \:circle \: is \: equal \:to \: \\ 39.47 \\ \\ the \: area \: of \: circle \: = \pi {r}^{2} \\( \pi \: = \frac{22}{7} ) \\ 39.47 = \frac{22}{7} \times {r}^{2} \\ {r}^{2} = \frac{39.47 \times 7}{22} = 12.55 \\ r = 3.5$