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Maths 71. By adding the same amount to its length and its width, a devel- oper increased the area of a rectangular lot by 3000

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71. By adding the same amount to its length and its width, a devel- oper increased the area of a rectangular lot by 3000 m to make it 80 m by 100 m. What were the original dimensions of the lot? See Fig. 7.19. 100 m 3000 m2 W 80 m

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