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### Discussion :: Simple Interest

1. What will be the ratio of simple interest earned by certain amount at the same rate of interest for 6 years and that for 9 years?

2.  A. 1 : 3 B. 1 : 4 C. 2 : 3 D. Data inadequate E. None of these

 Required ratio = $$\left(\frac { P\times R\times 6 } {100}\right)$$ = $$\frac { 6PR } { 9PR }$$= $$\frac { 6 } { 9 }$$= 2 : 3. $$\left(\frac { P\times R\times 9 } {100}\right)$$