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Question 7 The amount of water recommended by the United Nations for drinking, washing, cooking and maintaining proper hygiene per person per day is a minimum of (a) 5 L (b) 15 L (c) 30 L (d) 50 L |
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Answer» Question 7 The amount of water recommended by the United Nations for drinking, washing, cooking and maintaining proper hygiene per person per day is a minimum of |
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