To find the distance from the top of the flag pole to the tip of its shadow, we can visualize a right triangle where:
- One leg is the height of the flag pole (20 feet).
- The other leg is the length of the shadow (15 feet).
- The hypotenuse is the distance from the top of the flag pole to the tip of the shadow.
Using the Pythagorean Theorem, which states:
\[ a^2 + b^2 = c^2 \]
where \(c\) is the hypotenuse, and \(a\) and \(b\) are the other two sides, we can set up the equation:
\[ 20^2 + 15^2 = c^2 \]
Calculating \(20^2\) and \(15^2\):
\[ 20^2 = 400 \] \[ 15^2 = 225 \]
Adding these together:
\[ 400 + 225 = 625 \]
Now, we take the square root to find \(c\):
\[ c = \sqrt{625} = 25 \]
Thus, the distance from the top of the flag pole to the tip of its shadow is 25 feet.
The correct response is 25 feet.