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1. |
30 litres of salt solution contains 5% salt. How many litres of water must be added so as to get a resulted solution containing 3% salt?A. 20 litresB. 25 litresC. 30 litresD. 35 litres |
A. | B |
B. | C |
C. | D |
D. | A |
Answer» E. | |