Banking Quantitative Aptitude Sample Paper Quantitative Aptitude Sample Paper-6

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

A) 26. 34 L

B) 27.36 L

C) 28 L

D) 29.16 L

Correct Answer: D

Solution :

Amount of milk left after 3 operations

\[=\,\,\left[ 40{{\left( 1-\frac{4}{40} \right)}^{3}} \right]L=\left( 40\times \frac{9}{10}\times \frac{9}{10}\times \frac{9}{10} \right)=29.16L\]