arithmetic - in a mixture of 90 litres the ratio of milk and water is 2 1 if this ratio is to be 2 3 then the quantity of water to be further added is - skillgun

Solution: Quantity of milk = 90*2/3 = 60 litres.
Quantity of water in it = (90 - 60) = 30 litres.
New ratio required = 2 : 3.
Let the quantity of water to be added further be x litres.
Then, milk : water = 60/(30+x) = 2 : 3 => 180 = 60+ 2x => x = 60.
.'. Quantity of water to be further added is 60 litres.