Answer:
11 meters.
Explanation:
This problem models a right rectangle, where the hypothenuse is the length of the string, and the legs are the height and the horizontal distance. So, to find the answer, we just have to use the pythagorean theorem

Where

Replacing and solving for
, which is the height

Therefore, assuming there is no slack in the string, the height of the kite from the ground is 11 meters.