Question

A wheel completes 2000 revolutions to cover distance
of 7.5km. Determine the diameter of wheel,​

Answer 1

Solution

2000 revolutions×circumference of the wheel=7.5 km

now....let the radius of the wheel is=r metre

now...

2000×2πr=7.5×1000

=>4πr=7.5

$= > r = > 2r = 7.5 \times \frac{7}{44} \\ = > d = 2r = 1.193 \: meter$