SOLUTION: a rectangular prism has a square top with a side length of 9 inches and has a height of 18 inches. what is the surface area?
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Question 451220: a rectangular prism has a square top with a side length of 9 inches and has a height of 18 inches. what is the surface area? Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! It has 6 sides.
2 sides are 9 by 9
2 sides are 9 by 18
2 more are 9 by 18
SA = 2*(9*9 + 9*18 + 9*18) = 2(81 + 162 + 162)
= 2(405)
= 810 sq inches
