Question

can anyone solve this question with using pie as 3.14

Answer 1

circumferwnce of outer,
$2\pi \: r = 2 \times 3.14 \times 19 = 119.32m$

r of inner=19-10=9m
circumference of inner,
$2\pi \: r = 2 \times 3.14 \times 9 = 56.52m$