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
$(2 \, \frac{ft}{s}) = (2 \, \frac{ft}{s})*( \frac{1 \, mi}{5280 \, ft} )*(3600 \, \frac{s}{h} ) = 1.364 \, \frac{mi}{h}$

Answer:  1.364 mph