Answer:
87 yards
Step-by-step explanation:
We can represent the situation using the following figure
Therefore, the distance between opposite corners is the hypotenuse of a triangle with legs 63 yards and 60 yards.
Using the Pythagorean theorem, we get that the value of x is:
![\begin{gathered} x=\sqrt[]{63^2+60^2} \\ x=\sqrt[]{3969+3600} \\ x=\sqrt[]{7569} \\ x=87 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/zqsepzdk6wjgoomlvcid7thgia7grt9f9n.png)
Therefore, the answer is 87 yards