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Pizza deal

  1. Jan 10, 2007 #1
    The 8" pizza sells for $ 3.99 at my favorite pizza store. The store claims they have a great deal on the large 14" pizza, which is specially priced at $ 11. What is the per cent discount the store is offering?​
    :bugeye:
     
  2. jcsd
  3. Jan 10, 2007 #2
    Edited:: 75% off.
     
    Last edited: Jan 10, 2007
  4. Jan 10, 2007 #3
    edit: Blah
     
    Last edited: Jan 10, 2007
  5. Jan 10, 2007 #4
    Well I guess she logged off, but that was interesting.
     
  6. Jan 10, 2007 #5
    Not correct.........
     
  7. Jan 10, 2007 #6

    LeonhardEuler

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    Gold Member

    About 9.98% off.
     
  8. Jan 10, 2007 #7

    Kurdt

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    10% off give or take
     
  9. Jan 11, 2007 #8
    10%

    CORRECT!!!!
    Here goes the
    Solution:

    The small pizza has a diameter of 8" and therefore an area proportional to 82.

    The large pizza has a diameter of 14" and therefore an area proportional to 142.

    If the pizzas are priced in accordance with their areas, then

    Price of large pizza / Price of small pizza = (14 / 8)2 = 3.06 or

    Price of large pizza = 3.06 x 3.99 = 12.2.

    Thus, Discount on large pizza = [1 - (11 / 12.2)] x 100 = 10 %.
     
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