Civil Service Exam Reviewer · Ratio and Proportion · hard
Two numbers are in the ratio 5 : 8. If 20 is added to each, the ratio becomes 19 : 28. What is the larger of the original numbers?
- 140
- 75
- 120
- 160
Answer
C. 120
Solution
Let the numbers be 5k and 8k. (5k + 20)/(8k + 20) = 19/28 → k = 15. Larger = 8 × 15 = 120.
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