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9 November, 09:10

Two trains start from the same place and move in opposite directions. One moves 33mph and the othermoves at 27mph. How long does it take for them to be 480 miles apart

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  1. 9 November, 10:15
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    8 hours

    Step-by-step explanation:

    Train A moves at speed v1=33mph

    Train B moves at speed v2=27mph.

    Let t be the time when they are 480mi apart.

    d1=v1*t distance traveled by train A

    d2=v2*t distance traveled by train B

    d1+d2=480mi

    v1*t+v2*t=480mi

    (v1+v2) * t=480mi

    (33+27) * t=480mi

    60*t=480mi

    t=480/60=48/6=8hours
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