From two cities 2 trains left at the same time towards each other. The speed of the first is 90 km / h, and he traveled 360 km

From two cities 2 trains left at the same time towards each other. The speed of the first is 90 km / h, and he traveled 360 km before the meeting. The second train passed 280 km before the meeting. What is its speed?

1) Let’s find how long the first train was on the way:

360: 90 = 4 (hours) – the first train was on the way.

By the condition of the problem, the trains left at the same time. So the second train was also on the way for 4 hours.

2) Find the speed of the second train:

280: 4 = 70 (km / h) – speed of the second train.

Answer: the speed of the second train is 70 km / h.