SOLUTION: what would x be is the surface area is 864 cm2 and height is 12 cm and length is 16 cm

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Question 865609: what would x be is the surface area is 864 cm2 and height is 12 cm and length is 16 cm
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,



Surface = 2(12*16) + 2(12x) + 2(21x) = 664cm^2

                     2(12x) + 2(21x)  = 664-384

                                66x = 280

                                  x = 4.24