Problem:
In a narrow alley of width a ladder of length is placed with its foot at a point between the walls. Resting against one wall at , a distance above the ground, the ladder makes a angle with the ground. Resting against the other wall at , a distance above the ground, the ladder makes a angle with the ground. The width is equal to
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Answer Choices:
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B.
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E.
Solution:
In the adjoining figure is perpendicular to at .
Since is equalateral and . Also . Therefore, . Thus .
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