60. In the figure below, a ladder on level ground rests against the side of a building. The ladder reaches a point on the building that is 20 feet above ground. The angle formed by the ladder and the ground is 65°. A point on the ladder is 4 feet from the wall What is the vertical distance x, in feet, from this point on the ladder to the ground?

Answer and Explanation

Your Answer is

Correct Answer is F

Explanation

Assuming that the point on the ladder is A, we can know from the question that the distance between A and the building is 4, then the vertical distance between A and the upper end of the ladder is 4×tan 65°. The vertical distance of A from the ground is 20 – 4×tan 65°. Therefore choose F