Question

SSC Test Questions

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

Height of window from ground = 40 feet
distance of foot of window from wall = 9 feet

Length of ladder = $\sqrt{40^2+9^2}= \sqrt{1600+81}= \sqrt{1681} = 41$ feet

(because a right angled triangle is formed where ladder is the hypotenuse.)