(200 ft/sec) x (1mile / 5280 ft) x (3600 sec / hour) = (200 x 3,600 / 5,280) (ft - mile - sec / sec - ft - hour)
= 136.364 miles per hour (rounded)
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40 mph = about 58.6 feet per second.
37,000 (feet per second) = 25,227.27 mph
60 feet per second equals 40.91 miles per hour.There are 5280 feet in one mile. So . . .60 feet * (1 mile/5280 feet) = 0.01136 milesThere are, obviously, 60 seconds per minute, and 60 minutes per hour. So . . .1 second * (1 min/60s) * (1 hr/60 min) = .000278 hoursPutting the two ideas together, we have . . .0.01136 miles/.00278 hours = 40.91 miles/hourAnd there you go.
102 and 2/3 feet per second.
171 miles is 902880 feet. There are 18000 seconds in 5 hours. So in one second, you would travel 50.16 feet, which is just under 50 feet and 2 inches.