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A train without stoppages travels on an average 50 km an hour and with stoppages 40 kms an hour. Prove that the train stops on an average 12 minutes per hour.

A.	9 min	B.	10 min
C.	12 min	D.	13 min

Answer and Explanation

Answer:12 min

Explanation:
in one hour the train covers 50 km at 50 kmph, 40 km at 40 kmph
=> The difference in distance covered = 10 km
=> It would have covered this distance in 10/50 = 0.2 hours = 12 minutes
It stops for 12 minutes in an hour

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