A bus departed from the bus station at a speed of 40 kilometers an hour in an hour in the opposite direction another

A bus departed from the bus station at a speed of 40 kilometers an hour in an hour in the opposite direction another bus departed at a speed of 60 kilometers an hour in what time after the first bus left the distance between them would be equal to 240 km.

1) Before the second bus left the station, the first bus was on the way for 1 hour and traveled 40 * 1 = 40 km.
2) Find the total bus speed:
40 + 60 = 100 km / h.
3) Before the second bus left the station, the distance between the buses was 40 km, which means that they must travel together:
240 – 40 = 200 km.
4) Find out how long the buses will travel 200 km together:
200: 100 = 2 hours.
5) Therefore, in 2 + 1 = 3 hours after the first bus leaves the distance between the buses will be 240 km.
Answer: in 3 hours.