Question
Arjun borrowed Rs. 5000 at R% S.I. and Rs. 6000 at (R +
5)% S.I. for 2 years. The total interest paid was Rs. 2800. Find the rate at which he borrowed Rs. 6000.Solution
According to question, 5000 × R/100 × 2 + 6000 × (R + 5)/100 × 2 = 2800 100R + 120R + 120 × 5 = 2800 220R + 600 = 2800 220R = 2200 R = 10% So, R + 5 = 15%
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