A classroom is 10 m long, 6.4 m wide and 5 m high. If each student be given 
of the floor area, how many students can be accommodated in the room? How many cubic metres of air would each student get?
Given,
Dimensions of classroom = 10m × 6.4m × 5m
Area of room = length × breadth = 10 × 6.4 = 64 m2
Area of floor required by one student = 1.6 m2
∴ Number of students can sit in classroom = 
Volume of classroom = 10 × 6.4 × 5 m3
Air required by each student = 
12