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Question 68
The angle of elevation of a ladder leaning against a wall is 60o and the foot of the ladder is 4.6 m away from the wall. The length of the ladder is
Solution
Let length of ladder, AC = $$l$$ m
In $$\triangle$$ ABC, $$cos(60)=\frac{BC}{AC}$$
=> $$\frac{1}{2}=\frac{4.6}{l}$$
=> $$l=4.6 \times 2=9.2$$ m
=> Ans - (C)
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