If A Room Has Dimensions , What Is The Mass Of Air In The Room If Density Of Air At NTP Is 1.3 Kg/m3? [Density Of Water Is 103 kg/m3 and G = 10 M/s2]

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Question

 

If a room has dimensions , what is the mass of air in the room if density of air at NTP is 1.3 kg/m3?

[Density of water is 103 kg/m3 and g = 10 m/s2]

Solution

Correct option is

78 kg

 

As density is defined as the ratio of mass to volume, i.e.,

            

           

               

                = 78 kg. 

i.e., mass of air in the room is 78 kg which is unbelievable (as air is assumed to be weightless) but is true.

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