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General mathematics problem on time taken to fill tank with pipes ,problem is below

  1. Apr 4, 2012 #1
    A tank of 425 litres capacity has been filled using two pipes, the first pipe having been opened 5 hrs longer than the
    second.If the first pipe were to
    open as long as the second and the second pipe was open as long as the first then the the first pipe would deliver half the
    amount of water delivered by
    the second pipe;if the two pipes were opened simultaneously,the tank would be filled up in 17 hours.How long was the second
    pipe open?
    a)10 hrs
    b)12 hrs
    c)15 hrs
    d)18 hrs
     
  2. jcsd
  3. Apr 4, 2012 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    hi sumitsawai! welcome to pf! :wink:

    show us what you've tried, and where you're stuck, and then we'll know how to help! :smile:
     
  4. Apr 5, 2012 #3
    Re: general mathematics problem on time taken to fill tank with pipes ,problem is bel

    Thats general algebra. Try to change the problem into values maybe helpful - thats what I do.
     
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