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Homework Help: Word Problem using geometry

  1. Apr 18, 2009 #1
    1. The problem statement, all variables and given/known data
    A water tank is a rectangular box with a base which is square of side length 5 meters. At t=0 hours it has water to a depth of 2 meters. The rate water flows into the tank after t hours is 1+(t/2) m^3/hr. Make a graph of this on graph paper. Use your graph to find the depth of water in the tank after 2 hours.

    2. Relevant equations
    Area of trapezoid = (b1+b2)/2 * height

    3. The attempt at a solution
  2. jcsd
  3. Apr 18, 2009 #2
    Did you make the graph? It should just be a matter of reading from what you've drawn. Is the problem conceptual with making the graph itself or is it something else?

    You have volume of water on the y-axis and time on the x-axis, you know the initial height (and with the dimensions of the box you can find the volume), and you know the slope of the line. That's all you need.
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