suresh

• May 30th, 2005

 

51.2%

niranjan

• Jun 9th, 2005

 

52.2

Sandeep Kumar

• Jun 17th, 2005

 

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 %

Vaibhav Jain

• Jul 1st, 2005

 

Ans 
(0.8*0.8*0.8)*100 = 51.2

kavita kanyal

• Jul 7th, 2005

 

Ans: 51.2%

Harish

• Apr 17th, 2007

 

Ans : 44%

Krishnacumar

• May 29th, 2007

 

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

Rajyashre

• May 31st, 2007

 

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%

vruti

• Jun 25th, 2007

 

Water is replaced, not added.

pradipto_dg

• Aug 26th, 2007

 

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

azharuddin929

 Profile Answers by azharuddin929 

• Nov 16th, 2009

 

The options are a) 40% b) 90% c) 51.8% d) 58.2% and the right answer is 58.2%

muhammedkareem321

 Profile Answers by muhammedkareem321 

• Feb 2nd, 2010

 

The proportion of milk in t his mixture is 2:3

Given as Pure milk - 100%

20 perentage replaced by water. so it bcomes 80:20 . i.e, >>4:1
again 20 replaced.( kindly note that this replacement is done from 100 percentage of milk which already given, not from the 80 percentage ). Therefore the ratio become 60:40 >>>3:2
again 20 percentage replaced. so it become 40:60 >>>>2:3

Therefore we can conclude that give milk turns into 40 percentage of milk and 60 percentage of water>>>02:03

prititripathi

 Profile Answers by prititripathi 

• Feb 25th, 2011

 

let pure milk b 1oo

so 20 of 100=80

again reducing 20 of 80=64

again reducing 20 of 64=51.2

KRITIKA

• Sep 26th, 2011

 

answer is 51.2

Karen jain

• May 22nd, 2016

 

51.20%

Ja Broni

• May 23rd, 2016

 

The math
20% of 100 is 20 = 80% milk | 20% water
20% of 80 is 16, 16 + 20 is 36, 100 minus 36 = 64% milk | 36% water
20% of 64 is 12.8, 12.8 + 36 is 48.8, 100 minus 48.8 = 51.2% milk | 48.8% milk