Two trains left two stations at the same time towards each other and met 5 hours later, one train was going

Two trains left two stations at the same time towards each other and met 5 hours later, one train was going at a speed of 30 km / h and the other 40 km / h find the distance between the stations.

There are two ways to solve the problem.
Method 1.
1. Let’s find the speed of convergence of trains:
30 + 40 = 70 km / h.
2. Let’s answer the question of the problem:
70 * 5 = 350 km / h.
Method 2.
1. Let’s find the distance covered by the first train in 5 hours:
5 * 30 = 150 km.
2. Let’s find the distance traveled by the second train in 5 hours:
40 * 5 = 200 km.
3. Now you can answer the question of the problem:
150 + 200 = 350 km.
Answer: the distance between the stations is 350 km.