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15 September, 09:24

Alvin paddled for 3 hours with a 4-Km/h current to reach a campsite. The return trip against the same current took 7 hours. find the speed of the boat in still water. The speed of the boat in still water was Km/h?

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  1. 15 September, 09:35
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    Alvin's average paddling 3km/h. The speed of the boat in still water was Km/h is given below

    Step-by-step explanation:

    Let the boat speed in still water be x km/hr.

    We know the current is 3 km/h so:

    4 (x+3) = 7 (x-3)

    4x + 12 = 7x - 21

    -3x = - 33

    x = 11 km/h

    Therefore the speed of the boat in still water is 11 km/h
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