Question
The compound interest on Rs. 5000 for 3 years at 10% p.a. will amount to = ?
Answer: Option B
$$\eqalign{
& {\text{Principal = Rs. 5000}} \cr
& {\text{Time = 3 years}} \cr
& {\text{Rate = 10}}\% {\text{ = }}\frac{1}{{10}} \cr
& {\text{Principal}}\,\,\,\,\,\,\,{\text{Amount}} \cr
& \,\,\,\,\,\,\,\,\,\,{\text{10}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\text{11}} \cr
& \,\,\,\,\,\,\,\,\,\,{\text{10}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\text{11}} \cr
& \,\,\,\,\,\,\,\,\,\,{\text{10}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\text{11}} \cr
& \underbrace {\overline {\,\,\,\,\,\,1000\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\text{1331}}\,\,\,\,\,} }_{331{\text{ units}}} \cr
& \Rightarrow 1000{\text{ units = Rs 5000}} \cr
& \Rightarrow 1{\text{ units = Rs 5}} \cr
& \Rightarrow 331{\text{ units = 331}} \times {\text{5}} \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\text{ = Rs. 1655}} \cr} $$
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$$\eqalign{
& {\text{Principal = Rs. 5000}} \cr
& {\text{Time = 3 years}} \cr
& {\text{Rate = 10}}\% {\text{ = }}\frac{1}{{10}} \cr
& {\text{Principal}}\,\,\,\,\,\,\,{\text{Amount}} \cr
& \,\,\,\,\,\,\,\,\,\,{\text{10}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\text{11}} \cr
& \,\,\,\,\,\,\,\,\,\,{\text{10}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\text{11}} \cr
& \,\,\,\,\,\,\,\,\,\,{\text{10}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\text{11}} \cr
& \underbrace {\overline {\,\,\,\,\,\,1000\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\text{1331}}\,\,\,\,\,} }_{331{\text{ units}}} \cr
& \Rightarrow 1000{\text{ units = Rs 5000}} \cr
& \Rightarrow 1{\text{ units = Rs 5}} \cr
& \Rightarrow 331{\text{ units = 331}} \times {\text{5}} \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\text{ = Rs. 1655}} \cr} $$
Was this answer helpful ?
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