A car travels from Bangalore to Mumbai and returns back in 20hours. What is the average velocity and average speed of the car if odometer reading of the car, when it started was 2200km and when finished was 3800km?
A
Average Velocity = 0kmph,
Average Speed =0kmph
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B
Average Velocity = 0kmph,
Average Speed = 80kmph
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C
Average Velocity = 80kmph,
Average Speed = 0kmph
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D
Average Velocity = 80kmph,
Average Speed = 80kmph
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Solution
The correct option is B Average Velocity = 0kmph,
Average Speed = 80kmph Given, displacement of the car = 0 (as initial position is same as final position ) When the car started the journey, the odometer reading was 2200km and when the car finished the journey, the odometer reading was 3800km. ∴ Distance covered = 3800−2200=1600km. Time taken = 20hours.
We know: Average velocity=TotaldisplacementTotaltime
Average velocity=0kmph
Average speed=TotaldistanceTotaltime
Average speed=160020=80kmph
∴ Average velocity of the car is 0kmph and average speed of the car is 80kmph.