It's 10.2 miles per hour. (rounded)
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1 mile per hour = 22/15 = 1.4666... feet per second (rounded, repeating)The following are exact numbers:-- 15 miles per hour = 22 feet per second-- 30 miles per hour = 44 feet per second-- 60 miles per hour = 88 feet per second-- 90 miles per hour = 132 feet per second-- 120 miles per hour = 176 feet per second
15 miles/hour (5280 feet/1 mile)(1 hour/3600 seconds) = 22 feet per second
85 Miles per Hour = 124.67 Feet per Second
At 550 miles per hour, it would be .15 miles per second.
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)