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21 January, 06:10

At a certain time of day, a tree that is x meters tall casts a shadow that is x-49 meters long. If the distance from the top of the tree to the end of the shadow is x+1 meters, what is the height, x, of the tree?

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  1. 21 January, 06:20
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    60 meters

    Step-by-step explanation:

    (x+1) ² = x² + (x-49) ²

    x²+2x+1 = x² + x²-98x+2401

    x² - 100x + 2400 = 0

    x² - 60x - 40x + 2400 = 0

    x (x - 60) - 40 (x - 60) = 0

    (x - 40) (x - 60) = 0

    x = 40, 60

    If x = 40, x - 49 = - 9 which is not possible

    So x = 60m
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