Aptitude - In pure milk if 20% replaced by water and in this again 20% is replaced by water and again 20% is re

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In pure milk if 20% replaced by water and in this again 20% is replaced by water and again 20% is replaced by water then what is the proportion of milk in that mixture

Total Answers and Comments: 10

Last Update: August 27, 2007

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Submitted by: Sandeep Kumar

just deduct 20% from 100 = 80,

again reduce 20% of 80 from 80 = 64,

again subtract 20% of 64 from 64 = 51.2

Ans = 51.2 %

Above answer was rated as good by the following members:
SKumarVembani, Shwethascar

May 30, 2005 09:26:49

suresh

RE: In pure milk if 20% replaced by water and in this again 20% is replaced by water and again 20% is re...

51.2%

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June 09, 2005 04:49:56

niranjan

RE: In pure milk if 20% replaced by water and in this again 20% is replaced by water and again 20% is re...

52.2

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June 17, 2005 15:38:30

Sandeep Kumar

RE: In pure milk if 20% replaced by water and in this again 20% is replaced by water and again 20% is re...

just deduct 20% from 100 = 80,

again reduce 20% of 80 from 80 = 64,

again subtract 20% of 64 from 64 = 51.2

Ans = 51.2 %

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2 0

Overall Rating: +2

July 01, 2005 04:18:11

Vaibhav Jain

RE: In pure milk if 20% replaced by water and in this again 20% is replaced by water and again 20% is re...

Ans
(0.8*0.8*0.8)*100 = 51.2

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July 07, 2005 04:49:46

kavita kanyal

RE: In pure milk if 20% replaced by water and in this again 20% is replaced by water and again 20% is re...

Ans: 51.2%

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April 17, 2007 02:06:15

Harish

RE: In pure milk if 20% replaced by wate...

Ans : 44%

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May 29, 2007 21:14:42

Krishnacumar

RE: In pure milk if 20% replaced by wate...

Let us say we have 100 ml of milk initially.

Now each time we increase the volume by adding 20% water to the new solution.

First time we add 20% of 100 ml = 20ml. Now new volume = 120
Next time we add 20% of 120 ml = 24ml . Now new volume = 144
Third time we add 20% of 144ml = 28.8. Now new volume = 172.8.

Now the percentage of milk = 100/172.8*100 = 58.07

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May 31, 2007 11:19:35

Rajyashre

RE: In pure milk if 20% replaced by wate...

The volume of the mixture doesn't change because it is given that milk is getting REPLACED with water....

hence the ans should be 51.2%

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June 25, 2007 03:19:24

vruti

RE: In pure milk if 20% replaced by wate...

Water is replaced, not added.

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August 26, 2007 09:42:25

#10

pradipto_dg

RE: In pure milk if 20% replaced by wate...

Pure milk - 100
20% replaced by water. so, it bcomes 80:20=4:1
again 20% replaced.so, 64:36=2:1
again 20% replaced. so, 51.2:48.8

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