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Skittles10412

  • 2 years ago

4. What is the value of x, if the volume of the cone is 12m3? (1 point) 4 m 5 m 6 m 10 m

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  1. Skittles10412
    • 2 years ago
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  2. Skittles10412
    • 2 years ago
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    for the 12m^3 it should be 12pim^3

  3. electrokid
    • 2 years ago
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    volume of cone is: \[V={1\over3}\pi r^2 h\] we have V=12m^3 r = (6/2)=3m find h = ?

  4. Skittles10412
    • 2 years ago
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    would the answer be 4? for the height???

  5. electrokid
    • 2 years ago
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    How? none of the options are right

  6. Skittles10412
    • 2 years ago
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    because how i got it was right it was 4 and i did that by doing 1/3*3^2 and got 3 and the only one that would get me to 12 was 4 because 3*4= 12

  7. Chelsea04
    • 2 years ago
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    yea, it'd be 4 for the height

  8. electrokid
    • 2 years ago
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    what happened to the \(\pi\)

  9. electrokid
    • 2 years ago
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    the question must have volume as \(12\pi\,{\rm m^3}\)

  10. Jada<3
    • 2 years ago
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    Divied 3 In 12 your answer is 4

  11. Chelsea04
    • 2 years ago
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    you could use pythagoras' theorem to work out the height btw...cause it is a right angled triangle.

  12. Skittles10412
    • 2 years ago
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    I didnt know that I could use that. ^_^

  13. Chelsea04
    • 2 years ago
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    it's just a way to check if your answer's right

  14. Skittles10412
    • 2 years ago
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    oh yeah now i remember lol this home schooling thing has kinda gottin my mind going a lil slow lol

  15. Chelsea04
    • 2 years ago
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    you could also substitute values into the formula and solve for h, which is the preferred method

  16. electrokid
    • 2 years ago
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    are you still sure the question does not have a "pi" in there?

  17. Chelsea04
    • 2 years ago
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    didn't @Skittles10412 write that 'for the 12 m^3 it should be 12pi m^3' at the top of the page?

  18. Skittles10412
    • 2 years ago
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    yeah im positive i finished the questions and i got 4m

  19. Skittles10412
    • 2 years ago
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    yeah i had to retype it to make sure that people who were going to help me knew that it was 12pi m^3 not 12m^3

  20. Chelsea04
    • 2 years ago
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    ok, sure thing!

  21. Skittles10412
    • 2 years ago
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    yup and than you to every one who helped me :)

  22. Whiterabbit541
    • 2 years ago
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    volume of cone = (1/3)(pi) x r^2 x h (pi) = 3.14159265359 6/2 = 3 12(pi) = (1/3)(pi) x 3^2 x h 12(pi) x 3 = (1/3 x 3/1) (pi) x 3^2 x h 36(pi) = (pi) x 3^2 x h 36(pi) = (pi) x 9 x h 36(pi)/(pi) = (pi)/(pi) x 9 x h 36 = 9 x h 36/9 = 9/9 x h 4 = h Answer = a) 4 m

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