Question
Varun borrowed Rs. 4000 at R% S.I. and Rs. 6000 at (R +
5)% S.I. for 3 years. The total simple interest paid was Rs. 2550. Find the rate on Rs. 6000.Solution
According to question, 4000 × R/100 × 3 + 6000 × (R + 5)/100 × 3 = 2550 120R + 180R + 180 × 5 = 2550 300R + 900 = 2550 300R = 1650 R = 5.5% So, R + 5 = 10.5%
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