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12 January, 10:44

A 20 foot ladder is leaned against a wall. If the base of the ladder is 8 feet from the wall, how high up on the wall will the ladder reach?

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  1. 12 January, 10:58
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    20^2=400

    8^2=64

    400-64=336

    square root of 336 is 18.33, so the latter is aprox. 18 feet up on the wall.
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