A) Rs. 82.60
B) Rs. 82.20
C) Rs. 81.80
D) Rs. 81.60
Correct Answer: D
Solution :
Principal \[=\frac{\text{SI }\!\!\times\!\!\text{ 100}}{\text{Time }\!\!\times\!\!\text{ Rate}}=\frac{80\times 100}{2\times 4}\]= Rs. 1000 |
\[\therefore \]\[CI=P\left[ {{\left( 1+\frac{R}{100} \right)}^{T}}-1 \right]=1000\left[ {{\left( 1+\frac{4}{100} \right)}^{2}}-1 \right]\] |
\[=1000\left[ {{\left( \frac{26}{25} \right)}^{2}}-1 \right]=1000\left( \frac{676}{625}-1 \right)\] |
\[=1000\left( \frac{676-625}{625} \right)=\frac{1000\times 51}{625}\]= Rs. 81.60 |
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