Question

A car travels on a circular road of radius $\frac{7}{22}$ km. When it covers a distance of $2km$ on the road, what will be its displacement?

• A. $2km$
• B. $0$
• C. $\pi$ $km$
• D. Can't be calculated from the given information

Answer 1

The correct option is B $0$

Radius of the circular road = $\frac{7}{22}$ km
So, perimeter of the road = $2\times \pi \times \frac{7}{22}$ km = $2\times \frac{22}{7}\times \frac{2}{22}km=2km$
This means, when the car covers a distance of $2km$, it makes one full round on the circular road.So, its initial and final positions should be same.
$\therefore$ displacement $=0$