720 feet per minute.
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60 times as many.
3.6
These are different dimensions there is no answer to the question as it stands. If instead you meant 3 cubic feet per second... then the answer is: 3 * 60 = 180 ( cu ft per minute ) = 1346 gallons per minute (four significant figures but the question only had one significant figure so taking that into consideration the answer is 1000 gal/min
There are 5,280 feet in a mile. So 90 miles per hour is 475,200 feet per hour. (90 x 5280) 475,200 divided by the 60 minutes in the hour comes out to 7920 feet per minute. Dividing 7920 feet per minute by the sixty seconds in a minute comes to 132 feet per second. This is also, if you are interested, 44 yards per second. (132 feet per second divided by three feet in a yard)
44.3181818 miles per hour == 65 feet*60 seconds=3900 feet/ minute 3900 feet/ minute* 60 minutes=234000 feet/hour 234000feet/hour/ 5280 feet=44.3181818 mph