SOLUTION: i have to find the radius of a hollow sphere
The metal in the sphere is 3cm thick and the volume of the metal is 684 times pi cm cubed.
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Question 284014: i have to find the radius of a hollow sphere
The metal in the sphere is 3cm thick and the volume of the metal is 684 times pi cm cubed.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
i have to find the radius of a hollow sphere
The metal in the sphere is 3cm thick and the volume of the metal is 684 times pi cm cubed.
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Volume of a sphere =
The volume of the 3 cm wall is the volume of a sphere of radius (r+3) minus a sphere or radius r.
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(r + 9)*(r - 6) = 0
r = 6 cm (inside radius)
r = 9 cm (outside radius)
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