250 mL of x M solution and 500 mL of y M solution of a solute A are mixed and diluted to 2 litre to produce a final concentration of `1.6` M.
if `x : y = 5 : 4` calculate x and y .

Explanation

To solve the problem step by step, we will use the concept of molarity and the relationship between the volumes and concentrations of the solutions mixed together.

### Step 1: Write down the information given
We have:
- Volume of solution X (V1) = 250 mL
- Molarity of solution X (M1) = x M
- Volume of solution Y (V2) = 500 mL
- Molarity of solution Y (M2) = y M
...