Two trains go towards each other on two parallel tracks at a speed of 54 km / h. The length of the trains is 360 m.

Two trains go towards each other on two parallel tracks at a speed of 54 km / h. The length of the trains is 360 m. Determine the time when they met and when their last cars part with each other?

Determine the total length of the two trains.

Since the length of each train is 360 meters, their total length will be equal to:

360 * 2 = 720 meters.

We find the speed of the convergence of trains.

To do this, multiply 54 km / h by 2.

We get:

54 * 2 = 108 km / h.

We translate the speed of the trains from km / h to m / s.

Since in 1 km – 1000 meters, and in 1 hour – 3600 seconds, we get:

108 * 1000/3600 = 108000/3600 = 30 m / s.

We determine the time.

We divide the distance by the speed.

720/30 = 24 seconds.

Answer:

24 p.