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TheNightKing
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TheNightKing

Rs. 6000 is invested at 16(2/3)% per annum simple interest.

If the interest is added to the principal after every 3 years, then after how many years the amount will become Rs. 15000?

Let the number of years required be n years.

Principal = Rs 6000
Amount = Rs 15000
Duration = n/3 3 year periods
Interest rate for every 3 years = 50/3% * 3 = 50%

15000 = 6000(1+50%)^(n/3) = 6000(1.5)^(n/3)
1.5^(n/3) = 2.5
n/3 = 2.25
n = 3*2.25 = 6.75 = 6 (2/3) years

IMO E
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