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anonymous

  • 5 years ago

A circular pool has radius 7.1 meters. You want to build a cement walkway all the way around it and you have enough cement for 33 square meters. How wide can you make your walkway? Give your answer to the nearest centimeter.

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  1. amistre64
    • 5 years ago
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    take the circomference of the pool and see what that measures

  2. amistre64
    • 5 years ago
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    or...or...... you have the area of 2 circles to find, one insid ethe other

  3. amistre64
    • 5 years ago
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    Area larger circle - Area smaller circle = 33

  4. amistre64
    • 5 years ago
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    pi(R^2) - pi(r^2) = 33 r = 7.1

  5. amistre64
    • 5 years ago
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    pi(R^2 - (7.1)^2) = 33 solve for R

  6. anonymous
    • 5 years ago
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    I got \[\sqrt{61}\]

  7. amistre64
    • 5 years ago
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    you got? prove it :)

  8. anonymous
    • 5 years ago
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    lol ok hold on

  9. anonymous
    • 5 years ago
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    YAYY

  10. amistre64
    • 5 years ago
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    yay!! was we right?

  11. anonymous
    • 5 years ago
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    YES! :)

  12. anonymous
    • 5 years ago
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    you are soo much more helpful than my teacher

  13. anonymous
    • 5 years ago
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    i learn more from you than i do form 2 hours of class

  14. amistre64
    • 5 years ago
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    we must be what they wrote about when they defined genius in the dictionary :)

  15. anonymous
    • 5 years ago
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    lol

  16. amistre64
    • 5 years ago
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    I forget more in 2 hours than I ever dreamed of learning :)

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