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21 January, 14:20

If the width and height of a rectangular prism are each shrunk to one seventh of the original size but the length remains the same, what is the formula to find the modified surface area

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  1. 21 January, 16:55
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    SA=2 (LW+LH+WH)

    if W turns to 1/7W

    and H turns to 1/7H

    SA=2 (L (1/7) W+L (1/7) H + (1/7) W (1/7) H)

    SA=2 ((1/7) LW + (1/7) LH + (1/49) WH)

    SA=2 (1/7) (LW+LH + (1/7) WH)

    SA = (2/7) (LW+LH + (1/7) WH)
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