We can use the Pythagorean theorem to find the height of the lamp post.
Let the height of the lamp post be h.
According to the Pythagorean theorem,
(25 feet)^2 = (20 feet)^2 + h^2
625 = 400 + h^2
225 = h^2
Taking the square root of both sides, we get:
h = ±15
Since the height of a lamp post cannot be negative, we can conclude that the height of the lamp post is 15 feet.
Therefore, the correct answer is 15 feet.
A 25 feet ladder is placed 20 feet away from a lamp post. Find the height of the lamp post.
15 feet
14 feet
17 feet
23 feet
1 answer