The simple interest at R% for R years will be Rs. R on a

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The simple interest at R% for R years will be Rs. R on a sum of ?

1. Rs. R
2. Rs. 100R
3. Rs. .(100/R)
4. Rs. (100/R²)

Correct Option: C

Sum = (100 x SI) / (R x T)
= (100 x R) / (R x R)
= Rs. 100/R