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: 11

Last Update: November 17, 2009

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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

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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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