a) 0.1%
b) 0.2%
c) 0.3%
d) 0.4%
Answer: c
Explanation: Let the rate of interest for two different sources is r1 and r2 respectively.
$$\eqalign{
& \frac{{1500 \times {{\text{r}}_1} \times 3}}{{100}} – \frac{{1500 \times {{\text{r}}_2} \times 3}}{{100}} \cr
& = 13.50 \cr
& 4500{{\text{r}}_1} – 4500{{\text{r}}_2} = 1350 \cr
& \left( {{{\text{r}}_1} – {{\text{r}}_2}} \right) = \frac{{1350}}{{4500}} = 0.3\% \cr} $$
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