Question

729 ml of a mixture contains milk and water in the ratio 7:2. How much more water is to be added to get a new mixture containing milk and water in the ratio 7 : 3 ?

• A. 600 ml
• B. 710 ml
• C. 520 ml
• D. Cannot be determined
• E. None of the above

Answer 1

The correct option is E None of the above

Milk =$(729\times \frac{7}{9})=567ml$
Water =729-567=162 ml
Now, $\frac{567}{162+x}=\frac{7}{3}\Rightarrow x=81ml.$