A class room is 10 m long, 6 m broad and 4 m high. How many students can it accommodate if one student needs 1.5 m² of floor area? How many cubic metres of air will each student have?

The given dimensions of class room are

Length (l) = 10 m

Breadth (b) = 6 m

Height (h) = 4 m

We know that,

Floor area of class room = l × b = 10 × 6 = 60 m².

Given,

One student needs 1.5 m² floor area.

So, the number of students = $\dfrac{60}{1.5}$ = 40.

By formula,

Volume of class room = l × b × h

= 10 × 6 × 4

= 240 m³.

Cubic metres of air for each student = $\dfrac{\text{ Vol. of classroom }}{\text{ No. of students }}$

= $\dfrac{240}{40}$

= 6 m³.

Hence, the classroom can accommodate 40 students and each student will have 6 m³ of air.