Sum

The dimension of a class-room are; length = 15 m, breadth = 12 m and height = 7.5 m. Find, how many children can be accommodated in this class-room; assuming 3.6 m^{3} of air is needed for each child.

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#### Solution

Length of the room = 15 m

Breadth of the room = 12 m

Height of the room = 7.5 m

Volume of the room = L x B x H = 15 x 12 x 7.5 m3 = 1350 m^{3}

Volume of air required for each child = 3.6 m^{3}

No. of children who can be accommodated in the classroom.

= `"Volume of the classroom"/"Volume of air needed for each child"`

= `(1350 "m"^3)/(3.6 "m"^3)`

= 375

Concept: Surface Area of a Cuboid

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