Consider a stone column 300 ft in diameter and 1000 ft high

Consider a stone column 3.00 ft in diameter and 10.00 ft high. What is its mass in pounds if its denity is 3.50 g/mL?

Solution

volume = pi *r^2 * h

= pi * 1.5^2 * 10 = 22.5 * pi

1g/ml = 62.4279606 pound/ ft^3

=>

desity = 3.5 * 62.4279606 pound/ft^3= 218.4978621

density = mass/volume

=>

mass = 218.4978621 * 22.5 * pi

= 15444.70 lbs