A ladder against a vertical wall makes an angle of 45º with the ground. The foot of the ladder is 3m from the wall. Find the length of the ladder.
Answer with explanationAnswer: Option B
Let AB be the wall and CB, the ladder.
Then, AC = 3m and ∠ACB = 45º
∴ Length of the ladder = CB = 3 √2
= (3 × 1.41) m = 4.23 m