IKMC 2027 - Grades 7-8 - Self-study SET 13 - Thematic Batch 3 Question 13

Mixture 1 contains liquids A and B in the ratio 1:4. Mixture 2 contains A and B in the ratio 1:1. Mix mixtures 1 and 2 in the ratio 5:1 to make mixture 3. How many litres of A are in 120 litres of mixture 3?