Question

a 50 M long leader least a window 12 metre high from the ground on placing it against a man at a distance a find the distance of the foot of the ladder is on the wall

Answer 1

apply Pythagoras therom

Let , ABC is triangle made by ladder window ground system
AB = 15m
BC = 12m
CA = ?

AB² = BC² + CA²
(15)² = (12)² + CA²
225 -144 = CA²
CA = √81
CA = 9 m