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31 Jul 2011, 02:29
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A mixture of 70 lts. Of wine and water contains 10% of water. How much water must be added to make 37% of the resulting mixture?
I picked this question from one of the sources on the internet.
Can someone please illustrate the solution using the diagram method for alligations .
Also, I feel the qs is dubious in its requirement of 37 % . Does it mean that 37 is the final resultant solution concentration ?
Please advise asap.
I have my exam in another 2 days
Thanks!
I picked this question from one of the sources on the internet.
Can someone please illustrate the solution using the diagram method for alligations .
Also, I feel the qs is dubious in its requirement of 37 % . Does it mean that 37 is the final resultant solution concentration ?
Please advise asap.
I have my exam in another 2 days
Thanks!
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01 Aug 2011, 12:04
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70 liters of water
10% water = 7 liters of water
How much water to add to get 37% water?
This one is easy because of the 100 value.
Add 30 liters of water.
The mixture is not 100 liters and of that, 37 liters are water.
37/100 = 37% water.
Not all problems will come to nice round numbers such as this. If it were a 50 liter mixture, it would be 18.5 liters of water. If it ended as a 80 liter mixture, it would be ~29 liters of water.
It's about rations/percents/parts of a whole.
10% water = 7 liters of water
How much water to add to get 37% water?
This one is easy because of the 100 value.
Add 30 liters of water.
The mixture is not 100 liters and of that, 37 liters are water.
37/100 = 37% water.
Not all problems will come to nice round numbers such as this. If it were a 50 liter mixture, it would be 18.5 liters of water. If it ended as a 80 liter mixture, it would be ~29 liters of water.
It's about rations/percents/parts of a whole.
01 Aug 2011, 12:29
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Its given that currently water is 10% of the mixture.
=> (10/100)(70) = 7lts
lets say x ltrs of water is added.
=> 7+x = (37/100)(70+x)
=> x = 30 liters
=> (10/100)(70) = 7lts
lets say x ltrs of water is added.
=> 7+x = (37/100)(70+x)
=> x = 30 liters
