The floor of a hall of size 15 × 20m is to be covered with a carpet of 2m widt.What is the minimum length of carpet required to cover the floor?
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area of the hall= area of the carpet= 20×18=360m^2
length of the carpet=360÷1.5=240m
1m^2 costs Rs10
360m^2 costs 10×360=Rs3600
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