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A train without stoppage travels at the speed of 90 km/h and with the stoppage, it travels at 78 km/h, How many minutes does the train stop on an average per hour? 

A train without stoppage travels at the speed of 90 km/h and with the stoppage, it travels at 78 km/h, How many minutes does the train stop on an average per hour?  Correct Answer 8

Given:
The train's speed is 90 kmph without stoppage and 78 kmph with stoppage

Formula used:

Speed = distance/time

Calculation:

Let the distance be 1170 km(LCM of 90 and 78)

Time without stoppage = 1170/90 = 13 hours

Time with stoppage = 1170/78 = 15 hours

Difference in time 2 hours = 120 minutes

∴ Average halt per hour = 120/15 = 8 min/hr

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