Question
How long will it take a sum of money invested at 5% p.a. S.I. to increase is value by 40% ?
Answer: Option D
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Let the sum be `x` . Then , S.I. = 40% of `x = (2x)/(5)` , Rate = 5%
`:.` Time = `(100 xx (2x)/(5) xx (1)/(x xx 5))` = 8 years .
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