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Question

If a car travels a distance of 120 km with a speed of 80 km/h and returns with a speed of 60 km/h. Calculate the average velocity for the entire journey.


A

75 km/hr

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B

45 km/hr

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C

70 km/hr

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D

0 km/hr

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Solution

The correct option is D

0 km/hr


The answer for this will be zero, as the car is returning to its original destination. The average velocity would be zero irrespective of different velocities in to and fro journey. Even if its speed while going is 80 km/hr and on return journey 60 km/hr, since it is returning to its original destination displacement is zero, so the average velocity.


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