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Question

A car travels from Bangalore to Mumbai and returns back in 20 hours. What is the average velocity and average speed of the car if odometer reading of the car, when it started was 2200 km and when finished was 3800 km?

A
Average Velocity = 0 kmph,
Average Speed =0 kmph
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B
Average Velocity = 0 kmph,
Average Speed = 80 kmph
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C
Average Velocity = 80 kmph,
Average Speed = 0 kmph
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D
Average Velocity = 80 kmph,
Average Speed = 80 kmph
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Solution

The correct option is B Average Velocity = 0 kmph,
Average Speed = 80 kmph
Given, displacement of the car = 0
(as initial position is same as final position )
When the car started the journey, the odometer reading was 2200 km and when the car finished the journey, the odometer reading was 3800 km.
Distance covered = 38002200=1600 km.
Time taken = 20 hours.

We know:
Average velocity=Total displacementTotal time

Average velocity=0 kmph

Average speed=Total distanceTotal time

Average speed=160020=80 kmph

Average velocity of the car is 0 kmph and average speed of the car is 80 kmph.

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