The average amount of water used by family is 20 litre per person per day . What is the total amount of water used by a family of 5 persons in 30 days
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in one day 1 person use 20 liters
in one day 5 person use 5 x 20 liters
in 30 days 5 person use 30 x 5 x 20 liters=3000 liters
so 5 person of a family use 3000 liters water
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