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A mixture contains nothing but water and acetone in a ratio
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Updated on: 19 Dec 2020, 09:48
Updated on: 19 Dec 2020, 09:48
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Question Stats:
71% (01:37) correct
28% (02:28) wrong based on 64 sessions
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A mixture contains nothing but water and acetone in a ratio of 1:2. After 200 mL of water is added to the mixture, the ratio of water to acetone is 2:3.
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
The original volume of the mixture |
1800mL |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Re: A mixture contains
[#permalink]
19 Dec 2020, 08:59
19 Dec 2020, 08:59
I solve it this way:
May someone clarifies were is the mistake :
1)water to Acetone 1:2
2) after addition 2:3
for water :
so , x+200= 2x
x= 200
then multiply to 3* 200= 600
but wrong. Where is the mistake?
May someone clarifies were is the mistake :
1)water to Acetone 1:2
2) after addition 2:3
for water :
so , x+200= 2x
x= 200
then multiply to 3* 200= 600
but wrong. Where is the mistake?
Re: A mixture contains nothing but water and acetone in a ratio
[#permalink]
19 Dec 2020, 10:05
19 Dec 2020, 10:05
Expert Reply
There is no need of calculation but just reasoning and looking at the proportion
At first w/a was 1/2
After 200 water which is even and which is the double of 100%, so we do have an arithmetic progression
The new ration is 2/3 or could be 4/6 or 8/12 and so forth
C must be the answer
At first w/a was 1/2
After 200 water which is even and which is the double of 100%, so we do have an arithmetic progression
The new ration is 2/3 or could be 4/6 or 8/12 and so forth
C must be the answer
