Question
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?
Answer: Option D
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Amount of milk left after 3 operations = \(\left[40\left(1-\frac{4}{140}\right)^{3}\right]litres\)
= \(\left(40\times\frac{9}{10}\times\frac{9}{10}\times\frac{9}{10}\right) =29.16 litres.\)
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