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14 February, 00:51

Shawn's wallet is falling apart. He wants to recover it with duct tape. If the cover of his wallet is 3 inches by 5 inches and it is 1 inch thick, how much duct tape is needed?

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  1. 14 February, 00:56
    0
    46 square inches.

    Step-by-step explanation:

    Given that:

    The cover of the wallet is 3 inches by 5 inches It has a thickness of 1 inch

    This is in the shape of a rectangular prism.

    To find out how much duct tape Shawn will need, we find the total surface area of the wallet.

    Total Surface Area of a rectangular prism = 2 (LB+LH+BH)

    L=5 in., B=3in., H=1 in.

    Therefore:

    Total Surface Area of a rectangular prism = 2 (5*3+5*1+3*1)

    =2 (15+5+3)

    =2 (23)

    =46 Square Inches

    The amount of duct tape needed will be 46 square inches.
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