Awall with a height of 20 feet is braced with a support post that forms a 30 degree angle with the top of the wall. what is the length of the support post?

The length of the support post is 40 ft.

Solution:

Given, the height of the wall is 20 ft; support post forms 30 degree

Refer the attached image

Let us name the triangle as ABC where AB is the wall (opposite side) of 20 ft and is 30 degree () and AC is the length of the post.

To find: The length of the post (AC)

we know the formula, (trigonometric formula)

On substituting the values we get,

The value of sin 30 degree is 0.5