Find compound interest on Rs. 8000 at 15% per annum for 2 years 4 months , compounded annually .
Time = 2 years 4 months = `2 4/12` years = `2 1/3` years.
Amount = Rs` [8000 xx (1 + 15/100)^2 xx (1 + (1/3 xx 15)/(100))]`
=Rs.` (8000 xx 23/20 xx 23/20 xx 21/20)`
= Rs. 11109
`:.` C.I. = Rs. (11109 - 8000) = Rs. 3109.
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