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 ?
Pick one.
A) 20
B) 21
C) 22
D) 23
E) 24

Rationale: "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"
Answer: A