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There are 5280 feet in a mile:
so 30 miles an hour can also be written as 30 x 5280 = 158400 feet per hour
There are 3600 seconds in an hour so to find the speed per second divide the speed (feet per hour) by this number of seconds to find the speed in feet per second:
158400/3600 = 44 feet per second
Therefore we need to find how many seconds to travel 25 feet
Divide the feet to be traveled by the number of feet traveled per second:
25/44 = 0.57 seconds
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