without stoppages , a train travels certain distance with an average speed of 300 km / h , and with stoppages , it covers the same distance with an average speed of 200 km / h . how many minutes per hour the train stops ?
"due to stoppages , it covers 100 km less . time taken to cover 100 km = 100 â  „ 300 h = 1 â  „ 3 h = 1 â  „ 3 ã — 60 min = 20 min answer a"
subtract(const_60, multiply(divide(200, 300), const_60))