A man rows a boat 440 feet upstream against a constant current in 8 minutes. He then rows 325 feet downstream (with the same current) in 5 minutes.

A man rows a boat 440 feet upstream against a constant current in 8 minutes. He then rows 325 feet downstream (with the same current) in 5 minutes. Find the speed of the current and the equivalent rate at which he can row in still water.