A train travels at the rate of 50 km/h without stoppages and it travels at 40 km/h with stoppages. How many minutes does the train stop on an average per hour?
Answer: (2) 12 min
Due to stoppages, it covers 10 km less per hour.
Time taken to cover 10 km = (10/50) x 60 = 12 min
Then, the train stops on an average 12 min per hour.
Hence, the correct answer is option (2) 12 min.