Question

A train travels at an average speed of 90 km/hr without any stoppages. However, its average speed decreases to 60 km/hr on account of stoppages. On an average, how many minutes per hour does the train stop?
(a) 12 mins
(b) 30 mins
(c) 10 mins
(d) 20 mins​

Answer 1

Answer:

B

Step-by-step explanation:

When there are stoppages, the average speed of the train is 50 km/hr which means that the train travels a distance of 50 km in one hour.

The time taken to cover 50 km at the original average speed of 60 km/hr = 50/60×60 min=50min

Hence, in one hour the train stops for (60 - 50) = 10 min

Answer 2

Answer:

30 min

Step-by-step explanation:

Subtract 90 from 60