Question

Determine the mass of air in slugs contained in a room whose dimensions are 15 ft x 20ft x 20ft. Assume the density of air is 0.0724 lb/ft3 . 

Answer 1

Given:

$V=\rm 15\:ft\times20\:ft\times20\:ft=6000\: ft^3$

$\rho=0.0724\rm\: lb/ft^3$

The mass of the air

$$m=\rho V\\ =0.0724\rm\: lb/ft^3*6000\: ft^3=434.4\: lb$$