Question

find the radius of a semi circle whose circumference is 396

please answer in detail
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Answer 1

$\red{ \large{circumference \: of \: circle = 396}}$

$\red{ \large{circumference \: of \: circele = 2\pi r}}$

$\red{ \large{396 = 2\pi r}}$

$\red{ \large{ \frac{396}{2} = \frac{22}{7} \times r }}$

$\red{ \large{198 \times \frac{7}{22} = r}}$

$\red{ \large{r = 9 \times 7}}$

$\red{ \huge{ \bigstar \: r = 63 \: \bigstar}}$