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April 2, 2015

April 2, 2015

Posted by **ES** on Saturday, March 16, 2013 at 2:42pm.

the width is 3in and the height in 7 in.

I did it this way.

front and back(height)

SA=lw*2

SA=15(7)2

SA=210in squared

Sides( width)= SA=lw*2

SA=3(7)2= 42 in squared

Top and bottom(length

SA=15(3)2

SA=90in squared

Total surface areais SA=210=42=90=342in squared

He must buy 342 in squared of wrapping paper

Did I do all the steps correctly.

Thanks

- math -
**Henry**, Sunday, March 17, 2013 at 12:53pmAs = 2(W*h + L*h + L*W)

As = 2(21 + 105 + 45) = 2(171)=342 in^2=

Surface area.

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