Question

90 percent and 97 percent pure solutions are mixed to obtain 21 litres of 95 percent pure solution. How many litres of each solutions are needed?

Answer 1

Solution Is here

Let 90% pure acid solution be A litre and 97% pure acid solution B

A+B = 21

90% of A + 97% of B = 95% of 21

=> 90A/100 + 97B/100 = 95*21/100

90A + 97B = 1995

By Solving A = 6, B=15

So 97% of pure acid is 15 Litre

Answer 2

Answer:

x=6 ; y=15

Step-by-step explanation:

hope it helps