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Q.

Without stoppages, a train travels certain distance with an average speed of 80 km/h, and with stoppages, it covers the same distance with an average speed of 60 km/h. How many minutes per hour the train stops?

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a

10

b

15

c

18

d

None of these

answer is A.

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Detailed Solution

Due to stoppages, it covers 20 km less

Time take to cover  20 km=2080h=14h

=14×60 min =15 min

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