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anonymous

  • one year ago

Cylinder A has a radius of 12 inches and a height of 6 inches. Cylinder B has a volume of 648π. What is the percent change in volume between cylinders A and B? Cylinder B is 50% smaller than cylinder A. Cylinder B is 25% smaller than cylinder A. Cylinder B is 150% bigger than cylinder A. Cylinder B is 200% bigger than cylinder A.

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  1. anonymous
    • one year ago
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    find the volume of cylinder A

  2. anonymous
    • one year ago
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    3.14 * 12^2 *6 3.14 * 144 *6 2712.96

  3. anonymous
    • one year ago
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    yup, now find the volume of cylinder B

  4. anonymous
    • one year ago
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    then divide the bigger volume by the smaller volume

  5. anonymous
    • one year ago
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    then convert that decimal into a percent

  6. anonymous
    • one year ago
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    but how do i find the volume of cylinder B when i dont know the radius

  7. anonymous
    • one year ago
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    because it says the volume of cylinder B is 648 times pi

  8. anonymous
    • one year ago
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    648 * 3.14 + 2034.72

  9. anonymous
    • one year ago
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    no,volume of A\[=\pi 12^2*6=864 \pi\] volume of B\[=648 \pi\] change in volume\[=864 \pi-648 \pi=216 \pi\] % change\[=\frac{ 216 \pi }{ 864 \pi }\times 100=25 % \] =25 %

  10. anonymous
    • one year ago
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    how did you get the volume of A to be 864.. Im confused ? @surjithayer

  11. anonymous
    • one year ago
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    \[v= \pi r^2 h\]

  12. anonymous
    • one year ago
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    he/she didn't get 864, he/she got 864*pi

  13. anonymous
    • one year ago
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    Oh i see what you did now my bad(:

  14. anonymous
    • one year ago
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    do not substitute the value of pi as the volume of B is 648 pi.

  15. anonymous
    • one year ago
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    oh, never mind - listen to @surjithayer I might be wrong

  16. anonymous
    • one year ago
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    i am a man.

  17. anonymous
    • one year ago
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    I understand now, Thank you soooooo muchhh!!

  18. anonymous
    • one year ago
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    yw

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