Posted by **Wilfredo** on Monday, February 11, 2013 at 12:54pm.

A water system of 2 in.(inside diameter) pipe, having a length of 1/4 mile, is to be flushed with a volume of water equal to twice that contained in the system. how much water (gallons) must be flushed through the system? (note: one cubic foot=7.481gal.)

- math -
**Steve**, Monday, February 11, 2013 at 3:35pm
if the pipe is full, it contains

pi * 2^2 * 1/4 * 5280 * 12 = 199051 in^3 = 115.19 ft^3

So, we want twice that, or

230.38 * 7.481 = 723.5 gal

- Math - correction -
**Steve**, Monday, February 11, 2013 at 3:35pm
rats. divide that by 4, since I was using radius=2, not diameter

## Answer this Question

## Related Questions

- Physics - Many hot-water heating systems have a reservoir tank connected ...
- Physics - Many hot-water heating systems have a reservoir tank connected ...
- Physics - Water flows under pressure from one pipe into a second pipe having ...
- Physics - A water pipe is made of iron with an outside diameter of 2.5 cm and ...
- Math - When an engineer inspects a pipeline she notices a high water mark. How ...
- Science - Hi Just want to know if water from a 20mm Polyethylene pipe under ...
- physics - The water supply of a building is fed through a main entrance pipe 6cm...
- physics - Water flows in a cylindrical, horizontal pipe. As the pipe widens to ...
- Physics help please** - A water pipe having a 2.1 cm inside diameter carries ...
- maths - A large pipe has a diameter of 9.8×10^2cm.Water flows in the pipe at a ...