Exams › SSC CGL (Prelims) › General

The investments of three partners, A, B, and C, are initially in the ratio 3:4:5. After a year, A adds ₹10,000, B adds ₹15,000, and C adds some amount to their respective investments. The new ratio of their investments becomes 5:7:9. Find the amount added by partner C.

1. ₹ 15,000
2. ₹ 20,000
3. ₹ 25,000
4. ₹ 30,000

Correct answer: ₹ 20,000

Solution

Let the initial investments be 3x, 4x, and 5x. After additions, they become 3x+10000, 4x+15000, and 5x+c in the ratio 5:7:9, so 3x+10000=5k and 4x+15000=7k. Solving gives x=5000 and k=8000, hence 5x+c=9k gives 25000+c=72000, so c=20000.

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