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Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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08 Nov 2010, 13:02
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73% (02:01) correct 27% (02:16) wrong based on 685 sessions
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Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solutions Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new liquid solution is liquid X?
A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%
Project PS Butler : Question #106
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Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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06 Apr 2012, 12:19
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5
rovshan85 wrote:
Solution Y is 30% liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kg of solution Y and 2 kg of solution Y are added to the remaining 6 kg of liquid, what percent of this new solution is liquid X?
a. 30 b. 33 1/3 c. 37 1/2 d. 40 e. 50
What is the easiest way to approach this type of problem and solve under 2 min.
In 8 kilograms of solution Y there are 0.3*8=2.4 kilograms of solution X;
After 2 kilograms of water are replaced by 2 kilograms of solution Y, to the existing 2.4 kilograms of solution X, 0.3*2=0.6 kilograms of solution X are added, so in the new solution of 8 kilograms there are 2.4+0.6=3 kilograms of solution X, which is 3/8*100=37.5% of this new solution.
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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08 Nov 2010, 23:01
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Answer:C Took time to solve this one, the statement 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid was confusing to me. After thinking more deeply, it was clear to me that new 2 kg of solution Y will also be 30% liquid X and 70% water, and then I was able to get the answer. That was a bit tricky and nice question. Kudos +1 for posting the question _________________
"I choose to rise after every fall" Target=770 http://challengemba.blogspot.com Kudos??
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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08 Nov 2010, 23:25
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Initially you start with 8kg of solution which has 2.4kg of X and 5.6kg of water Post evaporation : 2.4kg of X and 3.6kg of water Now we add back 2kg of Y --> 1.4Kg water + 0.6Kg X So we have left 5Kg Water & 3Kg X
Percentage concentration is (3/5)*100 or 37.5%
_________________
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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08 Nov 2010, 23:43
shrouded1 wrote:
Initially you start with 8kg of solution which has 2.4kg of X and 5.6kg of water Post evaporation : 2.4kg of X and 3.6kg of water Now we add back 2kg of Y --> 1.4Kg water + 0.6Kg X So we have left 5Kg Water & 3Kg X
Percentage concentration is (3/5)*100 or 37.5%
Yea, that's exactly how I solved but you know at first I was kinda adding 2 to 6 kg without considering liquid X and water's concentration within 2 kg being added.
_________________
"I choose to rise after every fall" Target=770 http://challengemba.blogspot.com Kudos??
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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11 Dec 2011, 22:43
Initially we have 8kg of solution which has 3/10 0f 8= 2.4kg of X and 7/10 of 8 = 5.6kg of water after evaporation : 2.4kg of X and 3.6kg of water Now we added 2kg of solution Y --> 7/10 of 2=1.4Kg water + 3/10 0f 2 =0.6Kg X So we have left 5Kg Water & 3Kg X
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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26 Aug 2013, 20:32
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rovshan85 wrote:
Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solution Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new solution is liquid X?
A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%
What is the easiest way to approach this type of problem and solve under 2 min.
1. The net effect of 2 kg of water evaporating and adding 2 kg of the solution is removing (-2 + 1.4 = -0.6) 0.6 kg of water and adding 0.6 kg of liquid 2 Therefore the changed solution contains, 2.4 + 0.6 = 3 kg of liquid and 5.6-0.6==5 kg of water. 3. Percentage of liquid is 3/8 * 100 % = 37 1/2 %
_________________
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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05 Jan 2016, 04:55
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1
rtaha2412 wrote:
Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solutions Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new liquid solution is liquid X?
A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%
The best way to solve these problems is to take one step at a time
Initial: 8 kg Solution Y This means Solution X = 2.4 kg, Water = 5.6 kg
Step 2: 2 kg of water is evaporated. Left over: Solution X = 2.4 kg and Water = 3.6 kg
Step 3: 2 kg of Solutoin Y is added Or, 0.6 kg of Solution X and 1.4 kg of water is added
Final: Solution X = 3, Water = 5 % of solution X = 3/8 * 100 = 37.5%
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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03 May 2016, 06:47
rtaha2412 wrote:
Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solutions Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new liquid solution is liquid X?
A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%
Hi,
I like using a table for mixture problems. This is what I came up with (see attachement):
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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Updated on: 28 Feb 2018, 21:08
Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solutions Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new liquid solution is liquid X?
A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%
let x=% of liquid X in new solution .3*8+.3*2=x(6+2) x=3/8=37.5% C
Originally posted by gracie on 18 Jul 2016, 19:23.
Last edited by gracie on 28 Feb 2018, 21:08, edited 1 time in total.
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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22 Sep 2018, 05:52
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DS00 wrote:
rtaha2412 wrote:
Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solutions Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new liquid solution is liquid X?
A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%
Hi,
I like using a table for mixture problems. This is what I came up with (see attachement):
I also used the similar approach. To Sum up: Initial 8 kilograms of Y consist of 2.4 kg X and 5.6 kg water. We then lose 2 kg water to evaporation, so we are down to 3.6 kg water. The final step adds 2 kg Y, which consists of .6 kg X and 1.4 kg water. Therefore, the final mixture contains 3 kg X and 5 kg water. 3/8 = 37.5%.
Re: Solution Y is 30 percent liquid X and 70 percent water. If 2 kilogram
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29 Dec 2018, 01:52
rtaha2412 wrote:
Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solutions Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new liquid solution is liquid X?
A. 30% B. 33 1/3% C. 37 1/2% D. 40% E. 50%
Project PS Butler : Question #106
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8 kg of the solution contains (8*0.3) kg = 2.4 kg of X
again,
2 kg of the add solution which is added will have 2*0.3 = 0.6 kg of X
Total final volume of the solution = 8 kg
Hence, % of X = (2.4+0.6)/8*100 = 3/8 * 100 =3* 12.5 = 37.5 %
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73% (02:01) correct 
