13feet ladder is placed 5feet away from the wall . the distance from the ground straight up to the top of the mall is 13 feet. will the ladder touch the top of the mall?

Answer 1

The ladder, ground, and wall form a right angled triangle. Use the Pythagorean Theorem.

a^2 + b^2 = c^2

5^2 + b^2 = 13^2

25 + b^2 = 169

Take it from there.