45 mph (5280 feet/1 mile)(1 hour/3600 seconds)
= 66 feet per second
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65 mph = 95.3 feet per second.
9.5333 feet
77.73 feet every second.
A plane going 300 miles per hour is going 440 feet per second. (300 * 5280 / 60 / 60) In four hours, it will have traveled 1,200 miles, or 6,336,000 feet.
30 mph = 30*5280 feet per hour = 30*5280/3600 feet per second = 44 feet per second (The conversion factor from mph to fps is 22/15)