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:
Answer: Option
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:
148 comments Page 7 of 15.
Shrikant said:
1 decade ago
Here is one shortcut for such type of problems.
Given quantity x lit.
Ratio p : q.
Ratio a : b.
Formula is x(pb-qa)/a(p+q).
Given quantity x lit.
Ratio p : q.
Ratio a : b.
Formula is x(pb-qa)/a(p+q).
Rpv said:
1 decade ago
@Shrikant.
Is this formula applicable of all type of problems?
Is this formula applicable of all type of problems?
Adnan ahmad said:
1 decade ago
Guys can anybody help me with this problem. The length and breadth of a rectangle is 57m and 38m respectively. Find the ratio of the length to breadth.
Bharath Reddy said:
1 decade ago
If 60 liters of the water is added, then the mixture contains only water because the mixture is of 60 liters. What about the milk in the mixture?
Raja sekharreddy said:
1 decade ago
(m1*w1)/L1 = (m2*w2)/L2.
(2*1)/60 = (1*2)/L2.
2/60 = 2/L2.
2L2 = 120.
L2 = 60.
(2*1)/60 = (1*2)/L2.
2/60 = 2/L2.
2L2 = 120.
L2 = 60.
Omkar said:
1 decade ago
Please correct if I am wrong.
The above problem can be rather simply solved by elimination of the Options:
Milk : 40litres.
Water: 20litres.
What value of water would you add to existing water so that it doubles compared to the quantity of milk (40 litres) present in the mixture : 20 + 60 = 80 (which is now double of 40)
Hence 60 litres.
The above problem can be rather simply solved by elimination of the Options:
Milk : 40litres.
Water: 20litres.
What value of water would you add to existing water so that it doubles compared to the quantity of milk (40 litres) present in the mixture : 20 + 60 = 80 (which is now double of 40)
Hence 60 litres.
Ramesh said:
1 decade ago
Is there any shortcuts?
Biseswar said:
1 decade ago
Formula = x(a*d-b*c)/c(a+b).
The required water = 60(2*2-1*1)/1(2+1) = 60 lit.
The required water = 60(2*2-1*1)/1(2+1) = 60 lit.
Kartik said:
1 decade ago
In first condition milk+water=40+20.
Now new ratio is 1:2 means value of water is double from milk now milk is already 40 so the value of water is 80. This means we have to add 60 liters water.
Now new ratio is 1:2 means value of water is double from milk now milk is already 40 so the value of water is 80. This means we have to add 60 liters water.
Arnav said:
1 decade ago
Why 2/3 is used in calculations?
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