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2x + 5
shorter side = 10 longer side = 19
(2x x 3x) x 2 = 12x (2x times 3x times 2)
Let the width be x: Perimeter = 2(7.9+x) = 26.8 15.8+2x = 26.8 2x = 26.8-15.8 2x = 11 x = 5.5 cm Area = 5.5*7.9 = 43.45 square cm
Add them all together.