The distance between cities A and B is 600 km. The train left town A at 11:00 pm and arrived in town B

The distance between cities A and B is 600 km. The train left town A at 11:00 pm and arrived in town B the next day at 9:00 am. What was the average speed of the train if on the way it made two stops for 15 minutes and one for 30 minutes.

1. Let’s calculate the time that the train was on the way:

24 – 23 = 1 hour;

1 + 9 = 10 hours

2. Let’s find the time of the train in motion:

2 15 + 30 = 60 minutes or 1 hour – stopping time;

10 – 1 = 9 hours

3. Let’s calculate the average speed:

600: 9 = 66 6/9 = 66 2/3 km / h.

Answer: 66 2/3 km / h.