Question

a ladder is leaning against the wall.the top of ladder is 9 feetabove the ground .if the bottom of the ladder is moved 3 feet fartherfrom the wall,the ladder will belying flat on the ground,still touching the wall.how long,in feet,is the ladder?

Answer 1

12 feet it will be correct answer

Answer 2

By Pythagoras theorem
H^2=B^2+P^2
=9^2+3^2
=81+9
H^2 =90
H=√90
=3√10