Answer:
20.88 ft
Explanation:
The height of the ladder, h = 20 ft
Distance between the base of the ladder and the house, d = 6 ft
The diagram representing the illustration is:
Using the Pythagora's theorem
[tex]\begin{gathered} l^2=h^2+d^2 \\ \\ l^2=20^2+6^2 \\ \\ l^2=436 \\ \\ l=\sqrt{436} \\ \\ l=20.88\text{ ft} \end{gathered}[/tex]
The top of the ladder will reach 20.88 ft up along the side of the house
