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March 27, 2017

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A tugboat goes 180 miles upstream in 10 hours. The return trip downstream takes 5 hours. Find the speed of the tugboat without a current and the speed of the current.

  • MAT 116 - ,

    speed of boat --- x mph
    speed of current -- y mph

    10(x-y) = 180 ---> x-y = 18
    5(x+y) = 180 ---> x+y = 36

    add them
    2x = 54
    x = 27
    then y = 9

    state proper conclusion

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