A) \[3%\]
B) \[\frac{1}{3}%\]
C) \[3\frac{1}{3}%\]
D) \[\frac{3}{10}%\]
Correct Answer: C
Solution :
\[\frac{\text{Simple}\,\,\text{interest}}{\text{Principal}}\text{=}\frac{\text{1}}{\text{9}}\] If the annual rate of interest be\[r%\], then Rate\[\text{=}\frac{\text{S}\text{.I}\text{. }\!\!\times\!\!\text{ 100}}{\text{Principal}\,\,\text{ }\!\!\times\!\!\text{ }\,\,\text{Time}}\] \[\Rightarrow \] \[r=\frac{1}{9}\times \frac{100}{r}\Rightarrow {{r}^{2}}=\frac{100}{9}\] \[\Rightarrow \] \[r=\sqrt{\frac{100}{9}}=\frac{10}{3}=3\frac{1}{3}%\]
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