Question

the density of air is 1.3kg/m³.what mass of air in a room measuring 2.5m❌4m❌10m
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Answer 1

Explanation:

here

density of air(d)= 1.3kg/cubic metre

volume of cuboid(room)=l ×b× h=2.5m×4m×10m=100m cube

mass(m)=?

we know that

density of cuboid= mass/volume

1.3kg/cubic metre= m/ 100

mass= 130kg

so the mass of air in a room is 130kg