Question

15 metre long ladder reached a window 12 metre height from the ground and placing it against a wall at a distance a find the distance of the foot of the ladder from the wall​

Answer 1

Answer:

by using Pythagoras theorem

(H)^2=(P)^2+(B)^2

(15)^2=(12)^2+(B)^2

(B)^2=(15)^2-(12)^2

(B)^2=225-144

B=√81

B=9m