One way to answer the question regarding a canal lock's rate of flow in seconds is as follows.
First, write down the formula - volume divided by time equals rate of flow.
Second, substitute for the variables - 3,202,008.7 cubic feet divided by 10 minutes equals 320,200.87 cubic feet per minute.
Third, convert your answer to seconds - one minute equals 60 seconds, therefore divide 320,200.87 cubic feet by 60 to get a rate of flow of 5,336.68 cubic feet per second.
If we want to find out the cubic meter rate of flow per second divide your result of 5,336.68 by 35.3 (previously stated conversion equivalent) to get an answer of 151.18 cubic meters per second.