Aptitude - Ratio and Proportion - Discussion

Thanks for everyone for explaining the answer.

For water calculation of 1st ratio.
Water: 60 * 1/3=20 lit
For second ratio the water ratio will be 2/3
So water to be added: [20+(2/3) * 60]=60 lit.
That's the answer is 'D.

The ratio is 2:1 the total mixture =60 litres let the amount of milk be 2x and amount of water be x so 2x+x =60 litres that is x=20 litres the amount milk is 40 litres.

If it is halved in the next ratio then the amount of water should be 2*40-20 = 60 litres.

60litres mixture ratio 2:1 then 40:20.

In the question, water is added to the mixture so milk quantity doesn't change.

New ratio 1:2 milk same i.e 40 then 2*40= 80 (water ratio 2) old is 40:20 new is 40:80 (80-20)= 60ans.

2:1 = 2 * 60 : 1 * 60,
= 120 : 60.
For 1:2 reverse it, so answer for new proportion is 60.

In 2:1 ratio milk +water=40 + 20 = 60 then,
In 1:2 ratio milk+water=20 + 40 = 60 now only total of water from both ratio is 60.

Hi, I can't understand the question help me to solve.

60 lt of water.

Take 3 empty glass.

We have to count 60 ltr with the ratio,
Now fill 2 glass with milk 20ltr = 40ltr.
And,

Now fill 1 glass with water 20ltr,
Mix milk 2(glass) + water 1(glass) = 3glass.
The mixture is now of 20(milk)+20(milk)+20(water) = 60ltr.

Now we want a new ratio 1:2.
For that how much water to be added in existing 60ltr solution.

We have 40ltr of milk in 60ltr and 20ltr water.
If we added 60ltr of water now then milk is 40ltr and water is (20+60) 80 which is 1:2.

Ratio= 2+1=3.
Mix= 60litr,
60/3=20,
Ratio= 2:1 then multiply by 20,
2*20=40 and 1*20=20,
Next ratio 1:2.

1 2
40 20 Cross multipy then the value is 80and 20.
80-20 = 60 is the answer.