Question

41. Acids with 25% and 40% concentrations are mixed to get 60 litres of 30% concentration. How
many of each kind is needed?​

Answer 1

Answer:

given 60litres of 30%

so 40% of x liters and 25% of (60-x) litres

0.4x+0.25(60-x)=0.3*60

40x+150-25x=180

15x=30

x=2

so

40% of 2 liters and 25% of (60-2=58) litres