About 660 feet per minute.
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liters per minute x 2.1189 = cubic feet per hour
FPM is feet per minute
Formula: cubic feet per hour x 7.481 = US gallons per hour (use 6.229 if you want to convert cubic feet to Imperial gallons)
About 1100 feet per second, which is the speed of sound.
You start by converting that to kilometers per hour, which would be 48 kilometers per hour. An hour contains 60 seconds, and to convert to smaller units of time, you divide, so 48/60 is 0.8 kilometers per minute.