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17-03-2017
Mathematics

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A ladder is placed against a wall of a building 20m above the ground. The foot of the ladder is 15m away from the bottom of the building. What is the length of the ladder?

Respuesta :

26-03-2017

By the Pythagorean Theorem:

L^2=20^2+15^2

L^2=400+225

L^2=625

L=25 m

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