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How much milk is now contained by the container?

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A container contains 40 litres of milk. From this container 4 litres of milk was taken out and replaced by water. This process was repeated further two times.
How much milk is now contained by the container?

posted Dec 15, 2015 by Dilbagh

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1 Answer

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Let's Milk=M, Water=W
M=40, W=0
1)M40-M4+W4=M36+W4=40lit...(-4lit)&(+4lit)
2)[M36-(36/40)*4]+[W4-(4/40)*4]...(-4lit)
=M32.4+W3.6
=M32.4+W3.6+W4...........................(+4lit)
=M32.4+W7.6
3)[M32.4-(32.4/40)*4]+[W7.6-(7.6/40)*4]....(-4lit)
=M(32.4-3.24)+W(7.6-0.76)
=M29.16+W6.84
=M29.16+W6.84+W4........(+4lit)
=M29.16+W10.84=40lit
Ans is 29.16 litres milk

answer Dec 15, 2015 by Jaikumar Bhatia



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