Question

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?

Answer 1

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 $\frac{2}{5}$. 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:

$\frac{2}{5}=\frac{90}{x}$

Where x is the amount of water to be added, in ml (milliliters).

Cross multiplication of the above equation will give us:

$2x=90\times 5=450$

Dividing both sides by 2 we will get:

$x=\frac{450}{2}=225$

Thus, if we put 90ml of concentrate in a glass, the water that should be added must be 225 ml.