Question

the radiusof a circular field is 24.5 m find the distance run boy in making 4 complete rounds

Answer 1

we find the circumference and then multiply by 4 because he runs 4 rounds
formula for circumference is
$2\pi \: r$
so it will be
$2 \times \pi \times 24.5$
which is equal to 153.938 meters
multiply this by 4 and you get 615.75 metres or 616 metres