RML MAINS 2025
Non Nursing Subjects
Medium
At an annual simple interest rate of 5%, how many years will it take for ₹100 to earn ₹40 as interest?
Appeared in: RML MAINS 2025
Explanation
- The question requires calculating the time period for a simple interest problem.
- The formula for Simple Interest (SI) is SI = (Principal × Rate × Time) / 100.
- Rearranging the formula to find Time (T) gives: T = (SI × 100) / (Principal × Rate).
- Substituting the given values: T = (40 × 100) / (100 × 5).
- Calculation: T = 4000 / 500 = 8 years.
Why Other Options Were Wrong
- Option A: Calculating the interest for 6 years gives (100 × 5 × 6) / 100 = ₹30, which is not the ₹40 required.
- Option B: Calculating the interest for 7 years gives (100 × 5 × 7) / 100 = ₹35, which is less than the ₹40 required.
- Option D: This option is incorrect because the correct answer, 8 years, is available as one of the choices.
Related Visual
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Calculation of Time in Simple Interest as background academic context rather than a clinical decision trigger.
- This is a quantitative aptitude question, not a clinical one.
- Quantitative aptitude is a component of many nursing entrance and recruitment exams to assess problem-solving and numerical ability.
- Strong numerical skills are essential for nurses in clinical practice for tasks like medication dosage calculation, IV drip rate monitoring, and interpreting lab results.
How to Approach the Question
- First, identify the type of question. This is a mathematics problem involving simple interest.
- Identify all the given values from the question: Principal (P) = ₹100, Rate (R) = 5%, and Simple Interest (SI) = ₹40.
- Recall the correct formula for simple interest: SI = (P × R × T) / 100.
- Determine what needs to be calculated. Here, it is the Time (T).
- Rearrange the formula to solve for the unknown variable: T = (SI × 100) / (P × R).
- Substitute the known values into the rearranged formula and calculate the result to find the correct answer.
Concept Tested & Keywords
- Concept Tested: Calculation of Time in Simple Interest
- Stem keywords: simple interest, rate, ₹100, ₹40, interest
- Lead-in keywords: how many years
Question ID
Qm1zb_iluFBFMMkEZa40Tc
Practise the full RML MAINS 2025
Attempt every question from this paper in a timed mock, then review the full solution for each one.
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