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12 April, 09:15

Imani sells shirts packed in boxes that are each 15in. x 10in. x 2in. Imani stacked 3 boxes and wrapped them with one piece of paper. How much paper did she use, not including overlap?

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  1. 12 April, 10:24
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    She used 600 square inches of paper.

    Step-by-step explanation:

    Since the box are 15 in x 10 in x 2 in and are stacked on top of each other, they form a bigger rectangular prism with 15 in x 10 in x 6 in. In order to calculate how much paper she used, we need to calculate the surface area of this prism, this is done by using the following formulla:

    surface area = 2*width*length + 2*width*height + 2*length*height

    surface area = 2*15*10 + 2*15*6 + 2*10*6 = 300 + 180 + 120

    surface area = 600 in².

    She used 600 square inches of paper.
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