Question

A car travels from point A to point B which are 160 km apart in 3 hours. The car comes back to point A in 2 hours, then the average velocity of the car in km/h is

• A. 64 km/h
• B. 32 km/h
• C. 24 k/h
• D. 0 km/h

Answer 1

The correct option is D 0 km/h

The car travels from 'A' to 'B' and returns to the point 'A'.
$\therefore$ The total distance covered = 160 + 160 = 320 km, the total displacement = 0 km.
Total time taken for the entire journey = 3 + 2 = 5 h.
We know, $averagevelocity=\frac{totaldisplacement}{totaltime}$
$=\frac{0}{5}=0km{h}^{-1}$