Question

A car travels a distance of $0.99km$ in which each wheel makes $450$ complete revolution. Find the radius of its wheels.

Answer 1

Number of revolutions $=450$

Distance $=0.99km=990m$

We know that

$No.ofRevolutions=\frac{Distance}{CircumferenceofWheel}$

Therefore,

$450=\frac{990}{2\pi r}$

$450=\frac{99}{2\times \frac{22}{7}\times r}$

$r=\frac{99}{2\times \frac{22}{7}\times 450}$

$r=0.035m$

Hence, this is the answer.