lemon squash 2 parts concentrate to 5 parts of water. if you put 90ml of concentrate in a glass, how much water should be added?

It is given in the question that in the lemon squash 2 parts concentrate is added to 5 parts of water. Thus it makes the concentrate to water ratio as 2:5 or [tex] \frac{2}{5} [/tex]. Now, if this ratio is maintained then the amount of water to be added to 90 ml concentrate in a glass can be calculated as:[tex] \frac{2}{5}=\frac{90}{x} [/tex]Where x is the amount of water to be added, in ml (milliliters).Cross multiplication of the above equation will give us:[tex] 2x=90\times 5=450 [/tex]Dividing both sides by 2 we will get:[tex] x=\frac{450}{2}=225 [/tex]Thus, if we put 90ml of concentrate in a glass, the water that should be added must be 225 ml.