From two cities, the distance between which is 120 km, 2 buses simultaneously departed in opposite directions.

From two cities, the distance between which is 120 km, 2 buses simultaneously departed in opposite directions. The first bus was traveling at a speed of 70 km / h. How fast the second bus was traveling if, 2 hours after leaving, the distance between them was 600 km.

Let’s find the distance traveled by the first bus in 2 hours:
70 * 2 = 140 km.
Since the distance was 600 km, the second passed:
600 – 120 – 140 = 340 km.
Then his speed was:
340: 2 = 170 km / h.
Answer: the second bus was traveling at a speed of 170 km / h.