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Thread: Algebra 2 Word Problem #2

  1. December 2nd 2009, 02:42 PM #1
    kelsikels
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    Algebra 2 Word Problem #2

    1.) The speed of a stream is 5 mph. If a boat travels 82 miles downstream in the same time that it takes to travel 41 miles upstream, what is the speed of the boat in still water?

    THANK YOU!
    Last edited by mr fantastic; December 2nd 2009 at 09:00 PM. Reason: Changed post title
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  2. December 2nd 2009, 02:48 PM #2
    skeeter
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    Quote Originally Posted by kelsikels View Post
    1.) The speed of a stream is 5 mph. If a boat travels 82 miles downstream in the same time that it takes to travel 41 miles upstream, what is the speed of the boat in still water?

    THANK YOU!
    basic idea for setting up equations is (rate)(time) = distance

    let v = speed of the boat in mph with no current

    downstream ...

    (v+5)t = 82

    upstream ...

    (v-5)t = 41

    solve the system for v
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