Question

A car starts from Bengaluru to Mumbai and returns back to Bengaluru again in $20\text{hr}$. What is the average velocity and average speed of the car if odometer reading of the car, when it started was $2200\text{km}$ and when finished was $3800\text{km}$?

• A. Average velocity: $0\text{kmph}$, Average speed: $0\text{kmph}$
• B. Average velocity: $0\text{kmph}$, Average speed: $80\text{kmph}$
• C. Average velocity: $80\text{kmph}$, Average speed: $80\text{kmph}$
• D. Average velocity: $80\text{kmph}$, Average speed: $0\text{kmph}$

Answer 1

The correct option is B Average velocity: $0\text{kmph}$, Average speed: $80\text{kmph}$

Displacement $=0$ (as initial position is same as final position)

So, average velocity $=0$

Distance $=3800-2200=1600\text{km}$

Average speed = $\frac{1600}{20}=80\text{kmph}$