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A 23 foot ladder is placed against a vertical wall of a building, with the bottom of the ladder standing on level ground 16 feet from the base of the building. How high up the wall does the ladder reach
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A 23 foot ladder is placed against a vertical wall of a building, with the bottom of the ladder standing on level ground 16 feet from the base of the building. How high up the wall does the ladder reach ?

User Kimpo
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A ladder against a wall makes a triangle where the ladder is the hypotenuses and the base is the distance the ladder is from the wall. Using Pythagorean theorem you will get 16.5 feet
User Xazen
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