Question

The diameter of a wheel is 6.25m and it turn thrice in a sec. Find the time that take to travel 600m.

Answer 1

the frequency (rotations in one second) is 3
the radius of wheel is 6.25/2=3.125 meter
perimeter of wheel=$2 \pi (3.125)$
lets say it take n rotations to travel 600m
$2 \pi (3.125)n=600$
therefore n=95.5 (app.)
as its frequency is 3
time taken is 31.83 s (app.)