Question

A ladder is resting with one end in contact with the top of a wall of height 12 m and the other end on the ground is at a distance 5 m from the wall. The length of the ladder is _____.

• A. 13 m
• B. 17 m
• C. 16 m
• D. 18 m
• E. None of these

Answer 1

The correct option is A 13 m

Let, BC be the ladder.
Then, BC =$\sqrt{{12}^2+5^2}=13m.$