SOLUTION: 3. Find the length of a rectangular prism that has a width of 6 inches, height of 4 inches, and surface area of 108 square inches.

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Question 613281: 3. Find the length of a rectangular prism that has a width of 6 inches, height of 4 inches, and surface area of 108 square inches.
Answer by ewatrrr(24785) About Me  (Show Source):
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Hi, 



rectangular prism with width of 6 inches, height of 4 inches, and surface area of 108 square inches

Finding L

  2(6·4 + 6·L + 4· L) = 108in^2

        L(6+4) = 30

             L = 3in