Answer:
You can calculate the area of the circle
We know the formula is: [tex]\pi*r^2[/tex]
And if diammeter is 800, then the radio is a half: 400
We replace:
[tex]\pi*r^2 --> \pi * 400^2[/tex] [tex]\approx 502654.8[/tex] feet
So now we can divide:
502654/1000 = 502,654 minutes