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Q.

A car moves from A to B with a speed of 30 kmph and from B to A with a speed of 20 kmph. What is the average speed of the car ?

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a

50 kmph

b

25 kmph

c

10 kmph

d

24 kmph

answer is D.

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Detailed Solution

Average speed
2v1v2v1+v2=24kmph

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