Correct Answer: Option C
Simple Interest ( SI) = Prn/100
Here, SI1 = 960 × 4 × r1/100 = 38.4 r1
Similarly, SI2 = 38.4r2
Given, SI1 – SI2 = Tk.28.8
i.e. 38.4 r1 – 38.4 r2 = 28.8
38.4 ( r1 – r2) = 28.8
So, r1 – r2 = 28.8/38.4
= 0.75%.
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