Question

How much of a 10% salt solution should be added to 60 liters of a 35% salt solution to obtain a mixture that is 30% salt solution

Answer 1

Answer:

Step-by-step explanation:

Consider 1 litre of the first solution, it contains 600ml salt and 400 ml water.

Consider 1 litre of the second solution, it contains 300 ml salt and 700 ml water.

If we add these two we get

2 Litre solution with 900 ml salt and 1100 ml water

Already we can see that % of the salt in this solution is 45%.

Hence we know that equal volumes of the two solutions must be mixed to get a 45 % salt solution.

Hence the total volume is 20 litres, 10 litres of each solution must be mixed to achieve the desired result.