1.

A train travelled 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?

Answer»

6 HRS 21 min



Time taken to TRAVEL 600 km = Distance/Speed =600/100 = 6 hour
Now we need to find out the NUMBER of stops in the 600 km travel.
Given that train stops after EVERY 75 km.
600/75 = 8

It means train stops 7 times before 600 km and 1 time just after 600 km. Hence we need

to TAKE only 7 stops into consideration for the 600 km travel.

Hence, total stopping time in the 600 km travel = 7 x 3 = 21 minutes

Total time needed to reach the destination = 6 hours + 21 minutes = 6 hrs 21 min



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