Answer:
65 feet
Step-by-step explanation:
Given that,
Length of a rectangle, L = 60 feet
Breadth of a rectangle, B = 25 feet
We need to find the diagonal length of the stage. We know that for a rectangle each angle is 90 degrees. Let x is the length of the diagonal. So,
[tex]x=\sqrt{L^2+B^2} \\\\x=\sqrt{(60)^2+(25)^2} \\\\x=\sqrt{3600+625} \\\\x=65\ \text{feet}[/tex]
So, the length of the diagonal is 65 feet. Hence, the correct option is (a).