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?

Answer 1

Note that
1 mile = 5280 ft
3600 s = 1 hour

The given speed is

`(2 \, (ft)/(s)) = (2 \, (ft)/(s))*( (1 \, mi)/(5280 \, ft) )*(3600 \, (s)/(h) ) = 1.364 \, (mi)/(h)`

Answer: 1.364 mph