Q.9) The dimensions of a hall are 10 mx 7 m x5 m. If the density of air is 1.11 kg / metre cube, find the mass of air in the hall. (Ans: 388.5 Kg)
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Answer:
388.5 kg
Explanation:
Dimensions of the hall= 10m× 7m× 5m
Volume of the hall= l×b×h
= (10×7×5)m3
=350m3
Volume of the hall=350m3
Density of the air =1.11 kg/m3
We know that,
Density=Mass/Volume
1.11 Kg/m3= Mass/350m3
Mass =Density×Volume
=(1.11×350)kg
=388.5 kg
Mass of air in the hall=388.5kg
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