1. 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
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By: anil on 05 May 2019 01.48 am
Let length of ladder, AC = $$l$$ m In $$ riangle$$ ABC, $$cos(60)=frac{BC}{AC}$$ => $$frac{1}{2}=frac{4.6}{l}$$ => $$l=4.6 imes 2=9.2$$ m => Ans - (C)
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