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A rain gutter is to be made of aluminum sheets that are 12 inches wide by turning up the edges 90°. See the illustration. (a)

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Solutioni. Given the aluminium sheet is Let the depth of the gutter 12 inches wide. S 2с the total perimeter of the gutter=> 12 - 400 50 42 : 12 12. (1 205 4 X. 3 inches provide the maximum Hence, The depth that will cross-sectional area is 3 inch3 => 6x-x²20 262-636 +8 <0 222-22-420 + $ so [-606: -276-678] - > 20(26-2) – 4(26-2) 30 2-2) (0-4) SO sign scheme tove +ve 0

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