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19 June, 19:52

The volume of the cone is 130 units^3. Solve for x.

Height: 13

Radius: x

+2
Answers (1)
  1. 19 June, 19:58
    0
    V = (1/3) hpir^2

    v=130

    h=13

    r=x

    130 = (1/3) (13) pix^2

    times both sides by 3

    390=13pix^2

    divide both sides by 13

    30=pix^2

    divide both sides by pi

    30/pi=x^2

    sqrt both sides

    x≈3.09

    radius is abou 3 units
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