Question

A man wants to reach a window which is 40 feet above the ground. The distance from the foot of the ladder to the wall is 9 feet. How long should the ladder be

Answer 1

By Pythagores Theorem: AB^2+BC^2=AC^2 40^2+9^2=AC^2 1600+81=AC^2 41=AC Length of the ladder = 41 feet