A passenger train moving at a speed of 56 km / h, passed by an oncoming freight train moving at a speed of 34
| January 3, 2021 | education
A passenger train moving at a speed of 56 km / h, passed by an oncoming freight train moving at a speed of 34 km / h, in 15 seconds. how long is the freight train?
Since the trains were moving towards the opposite direction, the speed of the passenger train relative to the freight train will be equal to the sum of their speeds:
56 + 34 = 90 km / h.
Let’s express this speed in meters per minute:
90 km / h = 90000/60 = 1500 m / min.
The transit time is also expressed in minutes:
15 s = 15/60 = 1/4 min.
Then the length of the freight train will be (multiply the speed by time):
1500 * 1/4 = 375 m.
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