SOLUTION: A rectangular prism has sides that are in the ratio of 3:5:9. If the volume of the prism is 8640 cm^3, then what is the surface area of the prism in square millimeters?
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Question 1114544: A rectangular prism has sides that are in the ratio of 3:5:9. If the volume of the prism is 8640 cm^3, then what is the surface area of the prism in square millimeters?
Answer by greenestamps(13200) (Show Source): You can put this solution on YOUR website!
Let the dimensions be 3x, 5x, and 9x. Then the volume is
The dimensions are 12, 20, and 36.
The surface area in cm^2 is
A square cm is 100 square mm, so...
Answer: surface area is 278400 mm^2.
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