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28 December, 21:28

It takes a boat 4 hours to travel downstream 84 miles and 5 hours to travel up stream 55 miles. What is the speed to the boat in still water? Mph what is the speed of the current? Mph

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  1. 28 December, 22:27
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    16 MPH boat speed still water

    5 MPH current speed

    Step-by-step explanation:

    84/4 - x = 55/5 + x

    x = (84/4-55/5) / 2 = 5 mph current speed in MPH

    11+5 = 16 is boat speed in MPH

    21 MPH downstream, 11 MPH upstream
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