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by ROHIT11111 » Thu Nov 05, 2015 4:13 am
A bucket contains 1 litre of milk. A milkman removes 10% of the content of the bucket and
replaces it with water. The next day the milkman again does the same operation and removes 10%
of the contents of the bucket and replaces it with water. He then sells the one litre of milk to a
customer at the rate of $12 per litre. If the milkman had purchased the milk at $10 per litre what is
his profit percentage on his cost price keeping in mind that due to his mixing he was able to save
some additional milk?
(A)20%
(B) 48.15%
(C) 50%
(D)55.45%

ANS-B
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Source: — Problem Solving |

by Jim@StratusPrep » Thu Nov 05, 2015 8:37 am
The cost of the 10 litres after dilution is 10(.9)(.9) = 8.1 --> this is removing 10% twice.

(12 - 8.1)/8.1 is a bit less than 50%, which is B
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