16.5 feet per second.
(171 miles / 3 hours) x (5,280 feet / mile) x (1 hour / 3,600 seconds) = 83.6 feet/second
42 miles = 221760 feet 3 hours = 10800 seconds 42 miles in 3 hours = 221760/10800 = 20.533 feet pe 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.
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.
17.6 feet/second*60 seconds/minute*60 minutes/hour=63360 feet per hour there are 5280 feet in a mile 63360 feet/hour*mile/5280 feet=12 miles per hour 90 miles/12 miles per hour=7.5 hours
miles (M) * 5280 = feet (D) hours * 3600 = seconds. (T) So D / T = or M * 5280/3600 . . . . . . . . . . 67.7 Miles per Hour = 99.29333333333332 Feet per Second
73.33 feet per second.
100 miles per hour = [ 146 and 2/3 ] feet per second. (You don't need to know how long the speed lasted in order to know the speed.)
40 feet per second is 27.27 miles per hour.
75 miles per hour = 110 feet per second
39.6 feet per second.