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

Описание: Welcome to Teachers Wallah TSW, Rajasthan’s fastest-growing platform for RPSC, REET, 1st Grade, 2nd Grade, 3rd Grade, LDC, Patwari, Police and all competitive exams.
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

We provide complete preparation for:
• RPSC 1st Grade
• RPSC 2nd Grade
• RPSC 3rd Grade
• REET Level-1 & Level-2
• Maths, Hindi Grammar, Rajasthan GK, Reasoning
• Structured courses + daily shorts
• Expert faculty with 15+ years experience

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