Simple interest
PART-B Unit I: Aptitude
PART-B • Unit I: Aptitude & Mental Ability
Simple Interest • 15 Model Questions
Organized from Easy to Complex with Step-by-Step Mathematical Solutions and LaTeX Formulas
Level 1: Standard Formula \(\mathrm{SI}=\frac{Pnr}{100}\) & Basic Parameters
Easy
Question 01
Direct Simple Interest & Total Amount
Arvind borrowed a sum of \(\mathrm{Rs.}\,8,000\) from Akash at \(7\%\) per annum simple interest. Find the total amount to be paid at the end of \(2\text{ years}\):
💡 Explanation:
- Formula: Simple Interest \(\text{SI} = \frac{P \times n \times r}{100}\)
- Given: \(P = \mathrm{Rs.}\,8,000\), \(r = 7\%\), \(n = 2\text{ years}\) \[\text{SI} = \frac{8000 \times 2 \times 7}{100} = 80 \times 14 = \mathrm{Rs.}\,1,120\]
- Total Amount: \[A = P + \text{SI} = 8000 + 1120 = \mathbf{\mathrm{Rs.}\,9,120}\]
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