Question
Sohan borrowed Rs. 4200 at R% S.I. and Rs. 3800 at (R +
6)% S.I. for 5 years. The total simple interest paid was Rs. 4340. Find the rate charged on Rs. 3800.Solution
According to question, 4200 × R/100 × 5 + 3800 × (R + 6)/100 × 5 = 4340 210R + 190R + 190 × 6 = 4340 400R + 1140 = 4340 400R = 3200 R = 8% So, R + 6 = 14%
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