7. A room is 4 m long, 4.5 m broad and 3.5 m high. How much air does it contain?
How many girls can sit in it, if each girl occupies 2.52 m3 of air space?
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Let the volume of air in the room =4.5 multiply 4 multiply 3.5=63m cube
No of girls =63/2.52=25 girls
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