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A certain sum invested at 10% p.a. simple interest amounts to ₹9,417 in 4 years 4 months. What will be the amount of the same sum at 121⁄2%…

3225Medium DSSSB TGT Computer Science 0 replies 1 views

A certain sum invested at 10% p.a. simple interest amounts to ₹9,417 in 4 years 4 months. What will be the amount of the same sum at 12¹⁄₂% p.a. in 2²⁄₅ years at simple interest?

A₹8,641
B₹8,531
C₹8,541
D₹8,631

Correct answer: C

Explanation

4 years 4 months = 13/3 years. Amount = P(1 + 0.1 × 13/3) = P × 43/30 = 9417, so P = 6570. At 12.5% for 2 2/5 years, interest = 6570 × 0.125 × 2.4 = 1971 and the amount = ₹8,541.

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