Simple Interest – Parameterized symbol problem: The simple interest at R percent per annum for R years is Rs R. On what principal will this occur?

Introduction / Context:
This symbolic question checks formula manipulation in simple interest: SI = P * r * t, with r expressed in percent per annum and t in years.

Given Data / Assumptions:

• SI = R rupees
• Rate = R% per annum = R / 100 per annum
• Time = R years

Concept / Approach:
Using SI = P * (R / 100) * R, solve for P such that SI equals R rupees.

Step-by-Step Solution:

Verification / Alternative check:

Why Other Options Are Wrong:

• Rs R / Rs 100R / Rs (R/100): dimensionally incorrect.
• Rs (100/R2): miswritten as R squared in denominator without proper notation; intended value is 100 / R.

Common Pitfalls:

• Mishandling the percent-to-decimal conversion.

Final Answer:
Rs (100/R).