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Answer:
Step-by-step explanation:
Ratio of water and milk are in direct proportion
200 : 400 :: x : 450
Product of means = product of extremes
400 * x = 200 * 450
x = [tex]\frac{200*450}{400}[/tex]
= 225 ml of milk
1 ml = 1/1000 l
225 ml = 225 ÷ 1000 = 0.225 l