Question

find the radius of a circle whose circumference is 57.2cm . (take
$\pi 22 \div 7$
​

Answer 1

Answer:

r=9.1cm

Step-by-step explanation:

$2\pi \: r = 57.2 \\ 2 \times \frac{22}{7} \times r = 57.2 \\ r = \frac{57.2 \times 7}{2 \times 22} \\ r = 9.1cm$