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WBCS Main Examination 2023 — Paper VI: Arithmetic and Test of Reasoning · Question 87 of 200

Q87
ArithmeticSimple & Compound Interest
If a sum becomes $\frac{2495}{2000}$ of itself in $4\frac{1}{2}$ years, find the rate of interest p.a.?
  1. a.4%
  2. b.5%
  3. c.5·5%
  4. d.6%

Answer: (C) 5·5%

Taking simple interest, the interest is $\frac{495}{2000}$ = 24·75% of the sum over 4·5 years. The yearly rate is 24·75 ÷ 4·5 = 5·5%. At 5% the interest would be only 22·5%.