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anonymous

  • one year ago

The volume of a cone that fits exactly inside a cylinder is 20 cubic feet. What is the volume of the cylinder? (5 points) Select one: a. 4 cubic feet b. 5 cubic feet c. 40 cubic feet d. 60 cubic feet

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  1. anonymous
    • one year ago
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    can anyone please help!!!

  2. anonymous
    • one year ago
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    @annas please help!

  3. anonymous
    • one year ago
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    @phi please help!

  4. phi
    • one year ago
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    can you draw a picture of this problem?

  5. anonymous
    • one year ago
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    there is no picture

  6. phi
    • one year ago
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    yes, I would guess not. But can you draw the picture ?

  7. anonymous
    • one year ago
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    oh ill try

  8. anonymous
    • one year ago
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    |dw:1432753887485:dw|

  9. anonymous
    • one year ago
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    I'm sorry I'm a little confused

  10. phi
    • one year ago
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    It would look like this |dw:1432754046569:dw|

  11. anonymous
    • one year ago
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    oh okay

  12. phi
    • one year ago
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    the important idea is that the cone has the same radius and same height as the cylinder the volume of a cone is \[ V_{cone}= \frac{1}{3} \pi r^2 h \] the volume of the cylinder is \[ V_{cylinder}= \pi r^2 h \] if r and h are the same in both equations, then the cone is 1/3 the volume of the cylinder

  13. phi
    • one year ago
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    or, in other words, the cylinder is 3 times bigger volume than the cone. if the cone is 20, what is 3 times bigger than that ?

  14. anonymous
    • one year ago
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    80?

  15. phi
    • one year ago
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    what is 3*20 ?

  16. anonymous
    • one year ago
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    oh my ad it's 60 i miscalculated

  17. anonymous
    • one year ago
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    bad*

  18. anonymous
    • one year ago
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    so the it would be 60 for the answer?

  19. phi
    • one year ago
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    yes

  20. anonymous
    • one year ago
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    thank you so much! I really appreciate you taking the time to help me!:)

  21. phi
    • one year ago
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    yw

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