surface are composite figures

Mathematics
Tutor: None Selected Time limit: 1 Day

Jun 5th, 2015

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The total height of the composite figure is h=(3*3) in.= 9 in.

surface area= (8*4*2)+(8*9*2)+(4*9*2). Note that we multiply by 2 in every part because there are 2 faces that are similar.

surface area= 64+ 144 + 72

surface area= 280 in.^2

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Jun 5th, 2015

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