Question

In a mixture of 60 litres, the ratio of milk and water is 2:1. If this ratio is to be 1:2, then the quantity of water to be further added is __________

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Answer 1

Quantity of milk = 60 $\times$ $\frac{2}{3}$ = 40 litres.

Quantity of water in it = (60 - 40) litres = 20 litres.

New ratio = 1 : 2

Let quantity of water to be added further be $x$ litres.

Then, milk: water = 40:(20 + $x$)

Now, 40:(20 + $x$) = 1:2

20 +$x$= 80

$x$ = 60