40 litres of milk contain 20% water find the water added to the milk so that it. may contain 40% water
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40 litres of milk contains 20% water
20% of 40 litres=20 x 40 /100
=8 litres
40% of 40 litres=40 x 40 /100
=16 litres.
As milk already contains 20% of 40 litres that is 8 litres
So if we add another 8 litres means total 16 litres water in 40 litres mitres will make 40% water in it.
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