What is the mass of water (in grams and pounds). contained in a 100. foot long pipe that has an internal diameter of 6.5 centimeters? The density of water is 1.00 g/ cm^3. The volume of a cylinder is (pi)r^2L.
there are 2.54 cm in an inch
volume = π * 3.25^2 * 12 * 2.54 * 100
...the result is in cm^3
...it also equals the mass in g
there are (approx) 453.6 g in a pound
...divide to find the mass in pounds