A) 6 L
B) 6.5 L
C) 5.5 L
D) 5 L
Correct Answer: D
Solution :
Water content in 40 L of mixture \[=40\times \frac{10}{100}=4\,\,L\] |
\[\therefore \]Milk content \[=40-4=36\,\,L\] |
Let x L of water is mixed. |
\[\therefore \] \[\frac{4+x}{40+x}=\frac{20}{100}\] |
\[\Rightarrow \] \[\frac{4+x}{40+x}=\frac{1}{5}\] |
\[\Rightarrow \] \[20+5x=40+x\] |
\[\Rightarrow \] \[4x=20\] |
\[\Rightarrow \] \[x=5\,\,\text{L}\] |
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