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25 August, 21:36

A 12ft by 15ft rectangular swimming pool has a 3ft wide no slip surface around it. What is the outer perimeter of the no-slip surface?. A - 78ft. B-78ft^2. C-198ft. D-198ft^2

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  1. 26 August, 00:14
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    First you add 3 twice to both sides of the swimming pool

    12 + 6 = 18

    15 + 6 = 21

    The perimeter is the sum of all sides therefore

    18 + 18 + 21 + 21 = 78

    The answer is A
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