a) 6.07%
b) 9%
c) 10%
d) 12.15%
Answer: b
Explanation:
$$\eqalign{
& {\text{CI for 2 years}}\,{\text{ = Rs. 282}}{\text{.15}} \cr
& {\text{SI for 2 year}}\,{\text{ = Rs. 270}} \cr
& {\text{SI for 1 year = }}\frac{{270}}{2} \cr
& \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = {\text{Rs.}}\,135 \cr
& {\text{Difference between CI and SI}} \cr
& {\text{ = }}\left( {282.15 – 270} \right) \cr
& {\text{ = Rs. 12}}{\text{.15}} \cr
& {\text{Required rate % }} \cr
& {\text{ = }}\frac{{12.15}}{{135}} \times 100 = 9\% \cr} $$
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