Profit, Loss & Interest

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Q1.Rs. 4,200 is lent in 2 parts. Interest on part 1 at 10% p.a. for 8 years equals interest on part 2 at 7% p.a. for 5 years. What is the second part?

Medium
A Rs. 2,921
B Rs. 1,853
C Rs. 4,200
D Rs. 2,100
Simple Interest PPSC

Correct Answer: A

Part 1 = x => Interest = 0.8x. Part 2 = (4200 - x) => Interest = 0.35(4200 - x). 0.8x = 1470 - 0.35x => 1.15x = 1470 => x = 1278.26. Second part = 4200 - 1278.26 = Rs. 2,921.74 ≈ Rs. 2,921.