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What is the volume? 3 ft 1 ft r Surface area = 22 square feet.

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What is the volume?

asked Feb 17, 2014 in GEOMETRY by johnkelly Apprentice

1 Answer

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Given rectangular prism sides are a = 3ft, b = 1ft, c = ?

Surface area of rectangular prism = 2ab+2bc+2ca

22 = 6+2c+6c

22 = 6+8c

Subtract 6 from each side.

22-6 = 8c-6

16 = 8c

Divide to each side by 8.

16/8 = 8c/8

c = 2

Volume of the rectangular prism = abc

= 3*1*2

= 6 cubic foot

answered Feb 17, 2014 by dozey Mentor

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