Calculate the mass of air enclosed in a room of length, breadth and height equal to 5m, 3m and 4m respectively. Density of air `=1.3(kg)/(m^3)`.

Explanation

`V=5mxx3mxx4m=60m^3`
`d=1.3(kg)/(m^3)`
`M=Vxxd=(60m^3)xx(1.3(kg)/(m^3))=78kg`