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10 September, 06:17

If train a leaves the station going 60 miles per hour and train b leaves one hour later going 85 miles per hour, how long will it take train b to catch up with train a?

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  1. 10 September, 06:46
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    Distance = Rate (speed) x Time

    D=60T Train A

    D=85 (T-1) Train B.

    60T=85 (T-1)

    60T=85T-85

    60T-85T=-85

    -25T=-85

    T=-85/-25

    T=3.4 Hours
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