without stoppages , a train travels certain distance with an average speed of 250 km / h , and with stoppages , it covers the same distance with an average speed of 125 km / h . how many minutes per hour the train stops ?
"due to stoppages , it covers 125 km less . time taken to cover 125 km = 125 â  „ 250 h = 1 â  „ 2 h = 1 â  „ 2 ã — 60 min = 30 min answer b"
subtract(const_60, multiply(divide(125, 250), const_60))