A) Rs. 5039
B) Rs. 5789
C) Rs. 6129
D) Rs. 4939
Correct Answer: A
Solution :
Annual compound interest = R% Then, given \[\frac{4000\times R\times 1}{100}=\left( 4320-4000 \right)\] \[\therefore \,\] \[R=\frac{320}{40}=8%\] \[\therefore \] Required amount \[=4000{{\left( 1+\frac{8}{100} \right)}^{3}}\] \[=\frac{4000\times 27\times 27\times 27}{25\times 25\times 25}\] \[=5038.848=\]Rs. 5039You need to login to perform this action.
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