Aptitude - Ratio and Proportion - Discussion

Here 2:1 and then 1:2 at first find the difference 2-1 = 1 and 1-2 is also 1 deference,
So, we say 1 unit = 60L.
The question is whether water should be added further?
Hence, the water ratio is 1, so the answer is 1*60 = 60.

The initial quantity of milk=(2/3)*90 = 60,
Initial quantity of water=(1/3)*90 = 30,
If the ratio is to be 2:3 the water to be added;
(60÷(30+x)) = 2/3,
X = 60.

By Using the relation,

X(ad-bc)/c(a+b)

We get,
= 60(2×2-1×1)/1(2+1),
= 60(4-1)/3,
= 60.

They are asking about the water, how can there estimated the total amount of litres of water?

Since it mentioned the water, then the answer is 40 litres.

40/20+x = 1/2.

Cross multiple;
80 = 20 + x.
x = 60.

48 litre of glycerin is mixed with 144 litre of rose water. D litre of total mixture is taken out and 32 litre of glycerin and 48 litre of rose water added in the mixture. The final mixture contains 30% of glycerine. Find the quantity of mixture that is taken out? Please solve it.

2:1 = 40+20 = 60.
New Ratio 1:2 = 20+40 = 60.
Answer 60.

40/20+x=1/2 anyone can solve it?

@Gokul.

Can you tell me how it is 60?

Total mixture is 60ltr which contains milk and water in the ratio 2:1, which means mixture contains 2 parts of milk and 1 part water.

2 parts + 1 part = 3 parts = 60 ltr.

Therefore 1 part =60/3 = 20 ltr.

Milk = 2 parts= 2* 20 =40 LTR.

Water = 1 part=1 * 20 = 20 ltr.

Now quantity of milk and water is changed in such a way to get the new amount of milk and water in the mixture as 1:2.

Now the 1 in 1:2 represent that the amount of milk in the mixture is not changed and it is same as 40ltr. The change is in the amount of water.

Here 1 part in 1:2 represent 40 ltrs of milk. Therefore 2 part 80 ltrs. That is we need 80 ltrs of water to get the new mixture ratio. We have 20 lts of water. Now additional 60 ltrs must be added.

So 60 ltrs is the answer.