SOLUTION: A rectangular prism has sides that are in the ratio of 3:5:9. If the volume of the prism is 8640 cm2, then the surface area of the prism, in square millimetres, is...
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Question 1027690: A rectangular prism has sides that are in the ratio of 3:5:9. If the volume of the prism is 8640 cm2, then the surface area of the prism, in square millimetres, is...
Answer by CubeyThePenguin(3113) (Show Source): You can put this solution on YOUR website!
(3x)(5x)(9x) = 8640
135x^3 = 8640
x^3 = 64
x =
sides: 12, 20, 36
surface area: 2(12 * 20 + 12 * 36 + 20 * 36) = 2,784 cm^2 = 278,400 mm^2
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