A ladder reaches a window 8 meters high on a vertical wall. If the ladder is positioned at a 45° angle to the ground, what is its length? (nearest to a whole number)
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 11 m.
Ladder length = AC
sin 45° = AB/AC
⇒ 1/√2 = 8/AC
⇒ L = 8√2 = 11.31.. ≈ 11 m