Question

help me to slove this question ❓​

Answer 1

Step-by-step explanation:

Suppose that AB is the ladder, B is the window and CB is the building. Then, triangle ABC is a right triangle with right-angle at C.

    By pythagoras theoram, we have

∴     AB2=AC2+BC2

⇒   252=AC2+202

⇒   AC2=625−400=225

⇒    AC=225m=15m

Hence, the foot of the ladder is at a distance 15m from the building.