Question

A car starts from Bangalore to Mumbai and returns back to Bangalore in $20hrs$. When started the odometer reading was $2200km$ and when finished it was $3800km$. Find the average velocity and average speed of the car?

• A. Average Velocity : 0km/hr, Average Speed : 0 km/hr
• B. Average Velocity : 0km/hr, Average Speed : 80 km/hr
• C. Average Velocity : 80km/hr, Average Speed : 80 km/hr
• D. Average Velocity : 80km/hr, Average Speed : 0 km/hr

Answer 1

The correct option is B

Average Velocity : 0km/hr, Average Speed : 80 km/hr

Given,

Total time taken = $20hr$

Intial reading = $2200km$

Final reading = (3800 ~km\)

Displacement = $0$ ( as initial position is same as final position )
Average Velocity = $\frac{Totaldisplacement}{Totaltime}$ = $0$;
Distance travelled = $3800km-2200km=1600km$
Average Speed = $\frac{1600}{20}$ = $80km/hr$