A passenger train departed from the platform at a speed of 45 km / h. After 4 hours another train departed

| January 31, 2021 | education

A passenger train departed from the platform at a speed of 45 km / h. After 4 hours another train departed after him and after 10 hours caught up with the first. How fast was the second train moving?

The speed of the first train is 45 km / h, and they caught up with him in 10 hours, which means that during this time he traveled a distance of 450 km.
1) 45 * 10 = 450 (km) the first train passed.

The first train traveled for 10 hours, and the second was 4 hours less, so the second traveled for 6 hours.
2) 10 – 4 = 6 (hours) the 2nd train was traveling.

The second train departed from the same station and caught up with the first train, so it also traveled 450 km.
The second train traveled 450 km and spent 6 hours on it, which means it was moving at a speed of 75 km / h.
3) 450: 6 = 75 (km / h) speed of the second train.

Answer: 75 km / h.



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