Answer: 14.6 feet
Step-by-step explanation:
Since, here a ladder which has the length 15 foot and it is far from the base of the wall by 3.5 feet.
Here L represents the length of the ladder while d represents the distance of the ladder from the base of the wall. ( shown in figure)
While h represents height that the ladder reaches up the wall.
Thus, L= 15 foot, d= 3.5 foot
Then on applying Pythagoras theorem,
[tex]L^2=d^2+h^2[/tex]
⇒[tex]15^2=3.5^2+h^2[/tex]
⇒[tex]225=12.25+h^2[/tex]
⇒[tex]h^2=21.75[/tex]
⇒[tex]h=14.5859521458[/tex]≈ 14.6 foot
Thus,height that the ladder reaches up the wall= 14.6 foot ( approx)
