Question

Calculate the mass of air in a room of dimensions 4.5 m * 3.5 m * 2.5 m if the density of air at N.T.P. is 1.3 kg m-3.

Answer 1

Solution:

Dimensions of room=4.5 m x 3.5 m x 2.5m

So ,the volume= length x breadth x height

= 4.5 x 3.5 x 2.5

= 39.375 m3

Given that 

density of air =1.3 kg m-3

We have a relation:

Mass= denstiy x volume

= 1.3 x 39.375

=51.188 kg

Answer 2

Calculate mass air cubical side 5m density Air 1.3kg/m³