The dimensions of a cinema hall are 100 m, 50 m and 18 m. How many persons can sit in the hall, if each person requires 150 m3 of air?
Length of cinema hall (l) = 100 m
Breadth (b) = 50 m
and height (h) = 18 m
∴ Volume of air in it = lbh
=100×50×18 m3=90000 m3
Air required for one person = 150 m3
∴ Number of persons in the hall
=90000150=600 persons