मूलधन कैसे निकालें? | Simple Interest Trick | Principal Find Formula | RPSC REET Maths | TSW

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In this new short video, Vishnu Sir explains one of the most commonly asked and scoring topics of Arithmetic—
“मूलधन (Principal) कैसे निकालें?”

This short is based on the transcript example:

ब्याज (SI) = ₹280

दर (Rate) = 7%

समय (Time) = 4 साल

मूलधन (Principal) = ?

Students learn EXACTLY how to rearrange the formula and solve easily.

⭐ Concept Explained in the Video (From the Transcript)
✔ 1. Standard SI Formula

SI = (Principal × Rate × Time) / 100

✔ 2. Given Values

Let Principal = x

Rate = 7%

Time = 4 years

SI = 280

Equation becomes:
(x × 7 × 4) / 100 = 280

✔ 3. Multiplication & Simplification

7 × 4 = 28

28 goes into 280 exactly 10 times

Therefore: x = 1000

So the correct answer is:
👉 मूलधन = ₹1000 (Option D Correct)

Vishnu Sir explains the logic clearly without shortcuts so that beginners can build confidence from ZERO.

⭐ Why This Topic Matters for Competitive Exams

Simple Interest (साधारण ब्याज) and Principal-related questions are repeatedly asked in:

✔ RPSC 1st Grade Maths
✔ RPSC 2nd Grade Maths
✔ RPSC 3rd Grade Level-1 & Level-2
✔ REET Level-1 & Level-2 Maths
✔ Police, Patwari, LDC, Junior Assistant
✔ SSC GD, Railway, CET, Banking Basics

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⭐ About Teachers Wallah TSW

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