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A train traveled at an average speed of 100 km/hr, stopping for 3 minutes after every 75 km. How long did it take to reach its destination 600 km from the starting point.

A. 6 hours 24 mins

B. 6 hours 21 mins

C. 6 hours 18 mins

D. 6 hours 15 mins

Correct Answer :

B. 6 hours 21 mins


Time taken to cover 600 km = 6 hours 
Number of stops = 60075-1=7
Total time on stops = 7*3 = 21 mins
Total time taken by train = 6 hours 21 mins

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