There are 5,280 feet in a mile. 65*5280= 343,200
So, approximately 343,200 feet per hour.
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40 mph = about 58.6 feet per second.
37,000 (feet per second) = 25,227.27 mph
52 miles per hour equals 274560 feet per hour, divided by 60: equals 4576 feet per minute, divided by 60: equals 76.266666 or 76.27 feet per second.
3 mph = 4.8 km per hour
340 feet/second equals 1,224,000 feet per hour or about 232 mph (231.8182).From the calculation (340 x 3600)/5280 feet per mile