Question
Difference between CI and SI on a sum for 3 year at 20%
p.a. is 176. Find the simple interest on the sum after 2 years at 10% p.a.Solution
Let sum = Rs. 250 C.I. for 3 year at 20% p.a. = 250 × (12/10)3 – 250 = 182 SI for 3 year at 20% p.a. = (250 × 3 × 20)/100 = 150 Difference = 182 – 150 = 32  => 32 ------ 176 ⇒ Sum = (176/32) × 250 = Rs.1375 Required Interest = (1375 × 2 × 10)/100 = Rs.275
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