Quantitative Aptitude - Arithmetic Ability Questions

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The angle of elevation of a ladder leaning against a wall is 60 deg and the foot of the ladder is 4.2 m away from the wall. The length of the ladder is

A) 9.2 m	B) 11.4 m
C) 8.5 m	D) 13.5 m

Answer & Explanation Answer: A) 9.2 m

Explanation:

$Let AB be the wall and BC be the ladder . Then, ∠ ACB = 60 ° and AC = 4.6 m . AC / BC = \cos 60 ° = 1 / 2 \Rightarrow BC = 2 \times AC = (2 \times 4.6) m = 9.2 m$

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Quantitative Aptitude - Arithmetic Ability Questions

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