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17 May, 10:55

A 7,5m ladder is placed with its lower end 2m away from the wall. How high up the wall does the ladder reach?

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  1. 17 May, 14:15
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    Use the Pythagorean theorem:

    Let x = the height.

    2^2 + x^2 = 7.5^2

    Simplify:

    4 + x^2 = 56.25

    Subtract 4 from both sides:

    x^2 = 52.25

    Take the square root of both sides:

    x = 7.2284 m Round the answer as needed.
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