snailtrail snailtrail

23-05-2017
Mathematics

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The volume of the cone is 130 units^3. Solve for x.
Height: 13
Radius: x

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apologiabiology apologiabiology

23-05-2017

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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