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Sunshine447

The small pipe has a radius of 16 feet and a height of 48 feet while the large pipe has a height of 60 feet. What is the volume of the large pipe in terms of π? http://learn.flvs.net/webdav/assessment_images/educator_geometry_v14/pool_Geom_3641_0806_04/image0034e847d9e.gif

  • one year ago
  • one year ago

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  1. Faris_Waleed
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    First of all you know that the formula for calculating the volume of a cylinder is: V=pi*r(square)*height

    • one year ago
  2. Sunshine447
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    yeah

    • one year ago
  3. Faris_Waleed
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    OK, you have the radius and height for the small pipe and the height for the large pipe but you don't have the radius you need in order to calculate the volume, understood till here now?

    • one year ago
  4. Faris_Waleed
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    Did you understand ?

    • one year ago
  5. Sunshine447
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    u have to make a ratio, right?

    • one year ago
  6. Faris_Waleed
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    Yes like this: Height in the small pipe / Height in the large pipe = Radius in the small pipe / Radius in the large pipe

    • one year ago
  7. Faris_Waleed
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    Height in the small pipe = 48 cm Height in the large pipe= 60 cm Radius in the small pipe = 16 cm Radius in the large pipe= xcm Understood till here now?

    • one year ago
  8. Faris_Waleed
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    Now solve for x which will give you the radius of the large pipe

    • one year ago
  9. Sunshine447
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    cross multiply?

    • one year ago
  10. Faris_Waleed
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    yes

    • one year ago
  11. Sunshine447
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    okay, hold on

    • one year ago
  12. Sunshine447
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    12.8?

    • one year ago
  13. Sunshine447
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    wait... its 20

    • one year ago
  14. Faris_Waleed
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    Look, 16/x = 48/60 16*60*48*x 960=48x x=960/48 x=20

    • one year ago
  15. Sunshine447
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    so, then i multiply 20 by height?

    • one year ago
  16. Sunshine447
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    @Faris_Waleed

    • one year ago
  17. Sunshine447
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    @AccessDenied

    • one year ago
  18. Faris_Waleed
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    Yes you use the cylinder formula to calculate its volume

    • one year ago
  19. Sunshine447
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    i got 1200..... but that's not a choice...

    • one year ago
  20. Sunshine447
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    @CliffSedge

    • one year ago
  21. CliffSedge
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    What is the radius of the large pipe?

    • one year ago
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