Question

A person makes 50 rounds of a circular park of diameter 204m.find distance travelled by him.
chapter:-area & perimeter.

Answer 1

$2\pi \:r \\2\times \frac{22}{7} \times 102\\ 641.14 \: m \\ distance \: travelled \: by \: him = 641.14 \times 50 \\ 32057 \\ \frac{32057}{1000} \\ 32.057km$

Answer 2

circumference of a circle =πd= 3.14 ×204
=640.56
distance travelled =50 ×640.56
=32028m