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18 January, 01:15

A boat traveled 210 miles downstream and back. The trip downstream took 10 hours. The trip back took 42 hours. What is the speed of the boat in still water? What is the speed of the current?

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  1. 18 January, 01:20
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    16miles/hr

    Step-by-step explanation:

    Speed = distance/time

    Distance = 210miles

    Time downstream = 10hrs

    So, Speed = 210/10 = 21miles/hr

    Going through current time is 42hrs

    Speed = 210/42 = 5miles/hr

    Speed of current = (21 - 5) miles/hr

    = 16miles/hr
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