Two solutions of 90% and 97% purity are mixed, resulting in 21 L of mixture of 94% purity. The quantity of the second solution in the resulting mixture, (in L) is
Two solutions of 90% and 97% purity are mixed, resulting in 21 L of mixture of 94% purity. The quantity of the second solution in the resulting mixture, (in L) is
1). 15
2). 12
3). 9
4). 6
1 answers
advice - use alligation
let see- A B
90 97
94
(97-94) : (94-90)
3 : 4 = 7 = 21ltrs (given)
| | | |
| | 1 = 3ltrs
| 4*3ltrs = 12ltrs (second solution) = answer
3*3 = 9ltrs (first solution)