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Q.

A train without stoppage travels with an average speed of50 km/h, and with stoppage, it travels with an average speed of 40 km/h. For how many minutes does the train stop on an average per hour?

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a

13

b

12

c

14

d

15

answer is A.

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Detailed Solution

Distance travelled by the train in one hour 

Without stopage = 50 km 

With stopage = 40 km

Extra distance= 50-40 =10 km 

Hence, stopage time in one hour

=1050×60 =12 minutes 

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