Question
The dimensions of a cinema hall are 100 m, 50 m and 18m. How many persons can sit in the hall, if each required 150 m3 of air ?
Solution
= 100 m
b = 50 m
h = 18 m
∴ Volume of the cinema hall = 
= 100 × 50 × 18 = 90000 m3
Volume occupied by 1 person = 150 m3
∴ Number of persons who can sit in the hall = 
= 600
Hence 600 persons can sit in the hall. Ans.
