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Sixth grade primary school, People's Education Edition, Volume II, Mathematics Learning and Consolidation, with answers on pages 32, 33 and 34.
The first question seems to be unqualified.

The second problem is the direct ratio. Solution: Suppose that one month will waste X kilograms of water.

X : 30 = 24 : 2

2X = 720

x = 720 \2

X = 360

A: It wastes 360 kilograms of water a month.

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