80 2/3 feet per second
Work Step by Step
In order to solve this problem, we must convert miles per hour into feet per second. We know that there are 3600 seconds in an hour. Thus, we divide 55 miles per hour by 3600 seconds to obtain a speed of 55 miles per 3600 seconds. We also know that there are 5280 feet in a mile. Thus, we multiply 55 miles per 3600 seconds by 5280 feet to obtain an answer of 80 2/3 feet per second.