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19 September, 04:57

A cone is inscribed in a regular square pyramid. If the pyramid has a base edge of 6" and a slant height of 9", find the volume of the cone.

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Answers (2)
  1. 19 September, 05:06
    0
    V = (1/3) hpir²

    ok, so inscribed

    therefor the edge length is the diameter of the cone (the base is on bottom)

    so then d=6

    d/2=r

    6/2=3=r

    height

    we need pythagoran theorem to find this

    if we look at one side and draw the height then we get a right triangle with height is one leg

    3 is another

    and 9 is hyptonuse

    a²+b²=c²

    3²+h²=9²

    9+h²=81

    h²=72

    h=6√2

    h=6√2

    r=3

    V = (1/3) (6√2) (pi) (3²)

    V=18pi√2 cubic feet
  2. 19 September, 05:09
    0
    According to my calculations, the answer is 25.47 in^3.
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