Question

14. A 15 m long ladder reached a window 12 m high from the ground on placing it
against a wall at a distance a. Find the distance of the foot of the ladder from
the wall​

Answer 1

By Pythagoras theorem,  

(15)²=(12)²+distance ²  

225=144+distance ²  

225-144=81=distance²  

√81=distance  

9 = distance  

Wall is far away from the ladder by 9 metre  

I hope this much will help you