Using trigonometry, the diagonal distance between Ella and her mom is approximately 64.1 feet.
How the diagonal distance is determined:
The position of Ella = the top of the Ferris wheel
The position of Ella's mother = standing 26 feet from the base of the wheel
The angle of elevation from Ella’s mother to Ella = 68°
Let’s assume that the height of the Ferris wheel is h feet and the diagonal distance between Ella and her mom is d feet.
Then, using the tangent function, we can find h:
tan(68⁰) = 26h
Solving for h:
h = 26tan(68⁰) ≈ 63.6 feet
Using the Pythagorean theorem to find d:

Solving for d:
≈ 64.1 feet
Thus, the diagonal distance between Ella and her mom is approximately 64.1 feet.