Question

John has 2 apples his friend eats 2 hiw many are left

Answer 1

The ratio of volume of distilled water to the volume of antibiotic remain constant in order to main the strength of medicine.

Let x be the volume of water added to 30 centimeter cube of antibiotic.

So the relation is expressed as,

`\begin{gathered} (x)/(30cm^3)=(5cm^3)/(12cm^3) \\ x=(5cm^3\cdot30cm^3)/(12cm^3) \\ =(150cm^6)/(12cm^3) \\ =12.5cm^3 \end{gathered}`

So 12.5 centimeter cube is added to the 30 centimeter cube of antibiotic.

Answer: 12.5 centimeter cube.