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Homework Help: Problem solving radius and area.

  1. Aug 28, 2011 #1
    1. The problem statement, all variables and given/known data

    A circular garden is surrounded by fencing costing $5 per meter. If the total cost of the fencing is $100, find:

    a)the radius of the garden

    b)the area of the garden

    2. Relevant equations



    3. The attempt at a solution

    all I know is that it would make sense if the whole garden is 20 meters around.
     
  2. jcsd
  3. Aug 28, 2011 #2
    i screwed up but i might have this one lol.


    would the radius be about 3.18
     
    Last edited: Aug 28, 2011
  4. Aug 28, 2011 #3
    and would the area be 31.35m
     
  5. Aug 28, 2011 #4
    Yes, the radius is 10/pi meters which equals 3.18.
     
  6. Aug 28, 2011 #5
    For the area calculation, don't round off the radius. I think you used the 3.18 as the radius in your area calculation. If you use the 10/pi as the radius instead and go through with the area calculation, the answer will be 31.83 rounded to two decimal places.
     
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