# Aptitude - Ratio and Proportion - Discussion

Discussion Forum : Ratio and Proportion - General Questions (Q.No. 5)
5.
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
Explanation:

 Quantity of milk = 60 x 2 litres = 40 litres. 3

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 = 1 20 + x 2 20 + x = 80 x = 60. Quantity of water to be added = 60 litres.

Discussion:
135 comments Page 14 of 14.

Sonia arif said:   1 decade ago
Thnks ramesh, you told a simple way.

Mixture = 60 litre
ratio is 2: 1 , so milk:water=40:20
New ration= 1: 2 , means milk : water should be 40:80
Water in the new mixture should be 80
Less water already in the mix 20
Water to be added now is 60

in this que., it doesn't say that the new mixture's quantity is same as the before ones(60lr).Also we can't assume 60lr for the new mixture..So, as per the newmix. it's quant. is
water : 2/3 : 80 lr
milk : 1/3 : 40 lr
____________________
total: 120 lr