In a mixture of 126 the ratio of water and milk is 2 is to 5 respectively how much water in litre must be added to make the ratio of water and milk as 2 is to 3 respectively
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w:m=2:5=126
w=2x, m=5x
2x+5x=126
x=126/7=18
w=2*18=36, m=5*18=90
36+y/90=2/3
108+3y=180
y=72/3=24(ans)
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