2017 · Q50
25 kg of alloy X is mixed with 125 kg of alloy Y. If the amount of lead and tin in the alloy X is in the ratio 1 : 2 and the amount of lead and tin in the alloy Y is in the ratio 2 : 3, then what is the ratio of lead to tin in the mixture ?
Elementary MathematicsRatio and Proportion
- A1:2
- B2:3
- C3:5
- D7:11
Explanation
Lead: 25/3 (from X) + 50 (from Y) = 175/3 kg. Tin: 50/3 + 75 = 275/3 kg. Ratio = 175:275 = 7:11: option D.