Math Problem Statement

Arjun took a vehicle loan of Rs. 3,31 ,000 from a bank and returned it in three equal annual installments. If the rate of interest is 10% per annum compounded annually, then what is the value (in Rs.) of each installment? 01)133300 02)133100 03)123100 04)110100

Solution

To calculate the value of each installment, we use the formula for equated annual installments under compound interest:

EMI=Pr(1+r)n(1+r)n1EMI = \frac{P \cdot r \cdot (1 + r)^n}{(1 + r)^n - 1}

Where:

  • PP = Principal amount (loan amount) = Rs. 3,31,000
  • rr = Annual interest rate = 10% = 0.10
  • nn = Number of installments (years) = 3

Step 1: Calculate the effective interest factor

(1+r)n=(1+0.10)3=1.13=1.331(1 + r)^n = (1 + 0.10)^3 = 1.1^3 = 1.331

Step 2: Plug into the EMI formula

EMI=3310000.101.3311.3311EMI = \frac{331000 \cdot 0.10 \cdot 1.331}{1.331 - 1}

Simplify the numerator and denominator:

  • Numerator: 3310000.101.331=44096.1331000 \cdot 0.10 \cdot 1.331 = 44096.1
  • Denominator: 1.3311=0.3311.331 - 1 = 0.331

EMI=44096.10.331133,200.3EMI = \frac{44096.1}{0.331} \approx 133,200.3

Final Answer:

The closest value is 133,300 (Option 1).

Would you like a breakdown of the steps or a detailed derivation? 😊


5 Related Questions:

  1. How would the EMI change if the interest rate were 12% instead of 10%?
  2. What would be the total repayment Arjun makes over 3 years?
  3. How is the EMI formula derived mathematically?
  4. What is the difference between simple and compound interest in this context?
  5. How does the compounding period (e.g., monthly vs annually) affect the EMI?

Tip:

Always check if the interest rate is compounded annually, semi-annually, or monthly, as it affects the calculation significantly!

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Math Problem Analysis

Mathematical Concepts

Compound Interest
Equated Monthly Installments (EMI)
Exponential Functions

Formulas

EMI = (P * r * (1 + r)^n) / ((1 + r)^n - 1)

Theorems

Compound Interest Formula

Suitable Grade Level

Grades 10-12