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29 December, 17:37

Two trains leave a city at the same time. One train goes west at a constant rate of 60 mph. The other goe east at a rate of 50 mph. How long will it take the trains to be 550 miles apart

A) 5 hours

B) 7 hours

C) 9 hours

D) 11 hours

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  1. 29 December, 18:01
    0
    5 hours.

    Step-by-step explanation:

    Combined speed of the trains = 50 + 60 = 110 mph. They are increasing the distance between them at 110 mph.

    Therefore the time when they are 550 miles apart is distance / speed

    = 550/110 = 5 hours.
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