Answer to Question #157044 in Financial Math for Aurin

Question #157044

A man borrows 850 taka from bank. The bill is renewed after every half year at an increase of 21% . After how much time amount will become 8500 taka.


1
Expert's answer
2021-01-21T19:34:56-0500

FV=PV(1+i)nFV=PV(1+i)^n

where FVFV is future value, PVPV is present value, ii is the interest per compounding period, nn is the number of compounding periods.

n=lnFVlnPVln(1+i)n=\frac{lnFV-lnPV}{ln(1+i)}


n=ln8500ln850ln1.21=12.08=6.04n=\frac{ln8500-ln850}{ln1.21}=12.08=6.04 years


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