What is the maximum rof area that can be served by a 4 inch diameter semicircular roof cutter? Cutter has a 1/4 per inch slope. Rainfall is 3 in. per hour.

What is the maximum rof area that can be served by a 4 inch diameter semicircular roof cutter? Cutter has a 1/4 per inch slope. Rainfall is 3 in. per hour.