Answer:
23.97 ft
Explanation:
In this question apply the expression for determining cosine of an angle.
Cosine of an angle x°=length of the adjacent side÷hypotenuse

where α is the angle in degrees, A is the adjacent side length, and H is the hypotenuse
Given α=32° and A=20ft H=?
Applying the expression

In this case, the length of the ladder represents the hypotenuse side of the triangle which will be 23.97 ft