This question is asking about the hypotenuse of the triangle that we made within the rectangle. Using the Pythagorean Theorem, we can use the formula \(a^{2} + b^{2} = c^{2}\) to find the hypotenuse of the triangle. Replacing a with 100 and b with 240, we get the equation \(100^{2} + 240^{2} = x^{2}\)
Simplifying the equation, we get 10,000 + 57,600 = \(x^{2}\)
We then get 67,600 = \(x^{2}\)
We then further find the square root of 67,600, which happens to be 260.
Kim has walked 260 feet across the rectangular field.