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Answer : 1 3 Explanation : Answer: A) 3 Explanation: Water required = 4000 x 140 = 560000 lit = 560 cu.m (1 cu.m = 1000 lit)Volume of tank = 18 x 12 x 8 = 1728 cu.mWater of this tank will suffice for = 1728/560 = 3 days.

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