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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

15

b

18

c

10

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 $20 km = \frac{20}{80} h = \frac{1}{4} h$

$= \frac{1}{4} \times 60 \min = 15 \min$

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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?