Question

In an offshore pipeline, a cylindrical mechanism called a pig is run through the pipes periodically to clean them. These pigs travel at 2 feet per second. What is this speed, expressed in miles per hour? Show work

Answer 1

2 feet per second is how many feet per minute? Do this first. So:
2 ft/ sec = x ft / min
multiply by 60. So it is 120 ft/min. Now convert to feet per hour. Multiply by 60 again.
120 x 60 = 7200
7200 ft / hour.

NOW convert feet to miles.
7200 feet = 1.36364 miles

SO 1.36 miles per hour