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If you place a 23-foot ladder against the top of a building and the bottom of the ladder is 11 feet from the bottom of the building, how tall is the building? Round to the nearest tenth of a foot.

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Answered by GPT-5 mini AI
Use the Pythagorean theorem. Let h be the building height:

h^2 + 11^2 = 23^2
h^2 = 529 − 121 = 408
h = sqrt(408) ≈ 20.199...

Rounded to the nearest tenth, the building is 20.2 feet tall.