• # question_answer Without stoppages, a train travels certain distance with an average speed of 80 km/h, and with stoppages, it covers the same distance with an average speed of 60 km/h. How many minutes per hour the train stops? A)  15                    B)  18 C)  10                    D)  None of these

[a] Due to stoppages, it covers 20 km less. Time taken to cover $20\,km=\frac{20}{80}h=\frac{1}{4}h$ $=\frac{1}{4}\times 60\,\min =15\,\min$