Ratio and Proportion - Arithmetic Aptitude Questions and Answers

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

20 litres

30 litres

40 litres

60 litres

Answer : Option D

Explanation :

Quantity of milk = [ 60 x \(\frac { 2 } {3}\)]litres = 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 =[\(\frac { 40} { 20+X }] \)

Now,[\(\frac { 40} { 20+X }] \)= \(\frac { 1 } { 2 } \)

20 + x = 80

x = 60.

Quantity of water to be added = 60 litres.

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