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anonymous

  • one year ago

PLEASE HELP ME!!!

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  1. anonymous
    • one year ago
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    The volume for a cylinder is given by the formula V = r2h, where r is the radius of the cylinder and h is the height of the cylinder. If the volume of a cylinder with a height of 6 centimeters is 384 cubic centimeters, then what is the radius of the cylinder?

  2. anonymous
    • one year ago
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    A.64cm B.32cm C.48cm D.8cm

  3. anonymous
    • one year ago
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    @DanJS can you help me please??

  4. Rushwr
    • one year ago
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    are u sure that it V=2rh is the equation shouldn't it have a pi value sum where ?

  5. anonymous
    • one year ago
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    yeah hold on its

  6. anonymous
    • one year ago
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    \[V=\pi r ^{2}h\]

  7. anonymous
    • one year ago
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    and the other one is \[384\pi \]

  8. Rushwr
    • one year ago
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    if that's so \[r ^{2} = \frac{ V }{ \pi h }\] \[r = \sqrt{\frac{ V }{ \pi h }}\] Substitute and tell me the answer !!!!!

  9. Rushwr
    • one year ago
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    make sure that u substitute the value with units then u can see pi is getting cancelled off .

  10. anonymous
    • one year ago
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    i dont know how

  11. Rushwr
    • one year ago
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    Did u get the part how I subjected r ?

  12. anonymous
    • one year ago
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    because r is the radius and you have to find the radius of the cylinder thats why

  13. Rushwr
    • one year ago
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    u got that part right? now it's just the substitution and calculation

  14. anonymous
    • one year ago
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    yeah i got it

  15. Rushwr
    • one year ago
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    |dw:1443164607917:dw| right?

  16. Rushwr
    • one year ago
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    |dw:1443164718936:dw| Cut off the units now !

  17. Rushwr
    • one year ago
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    ??

  18. anonymous
    • one year ago
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    is it 32cm?

  19. Rushwr
    • one year ago
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    |dw:1443164817921:dw|

  20. Rushwr
    • one year ago
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    \[r = \sqrt{\frac{ 384cm ^{2} }{ 6 }} = \sqrt{64cm ^{2}} = 8cm\]

  21. anonymous
    • one year ago
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    oh i thought it was 64

  22. Rushwr
    • one year ago
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    hahahahahah !!!!

  23. anonymous
    • one year ago
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    can you help me with another one i will medal you this one

  24. Rushwr
    • one year ago
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    Did u get it now ?

  25. Rushwr
    • one year ago
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    lol no problem. Open up a new question okai ?

  26. anonymous
    • one year ago
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    yeah but not fully

  27. Rushwr
    • one year ago
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    Which part do u find it hard >

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