Question
The angle of elevation of a ladder leaning against a wall is 60° and the foot of the ladder is 4.6 m away from the wall. The length of the ladder is :_________?
Answer: Option D
LET AB BE THE WALL AND BC BE THE LADDER. THEN, ∠ACB = 60° AND AC = 4.6 M. AC/BC = COS 60° = 1/2 BC = 2 X AC = (2 X 4.6) M = 9.2 M.
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LET AB BE THE WALL AND BC BE THE LADDER. THEN, ∠ACB = 60° AND AC = 4.6 M. AC/BC = COS 60° = 1/2 BC = 2 X AC = (2 X 4.6) M = 9.2 M.
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