without stoppages , a train travels certain distance with an average speed of 400 km / h , and with stoppages , it covers the same distance with an average speed of 360 km / h . how many minutes per hour the train stops ?
"due to stoppages , it covers 40 km less . time taken to cover 40 km = 40 â  „ 400 h = 1 â  „ 10 h = 1 â  „ 10 ã — 60 min = 6 min answer d"
subtract(const_60, multiply(divide(360, 400), const_60))