Question

The dimensions of a hall are $10\times$ $7m\times$ $5m$. If the density of air is 1.11 kg$m^{-}3$. Find the mass of air in the hall.

Answer 1

The dimensions of hall $10\times$ $7m\times$ $5m$
i.e. V = 350 $m^3$
Density of air(D) = 1.11 kg $m^3$
Mass = volume $\times$ density

Mass = 350 $\times$ 1.11

= 388.5 kg