Calculate time for an amount INR 450 to generate an interest of INR 81 as the…

2023

Calculate time for an amount INR 450 to generate an interest of INR 81 as the interest at the rate of 4.5% per annum simple interest.

  1. A.

    4

  2. B.

    5

  3. C.

    11

  4. D.

    6

Attempted by 67 students.

Show answer & explanation

Correct answer: A

Key formula: Simple Interest = (Principal × Rate × Time) / 100

  1. Substitute the given values: Principal = 450, Rate = 4.5%, Simple Interest = 81.

  2. Set up the equation: 81 = (450 × 4.5 × Time) / 100.

  3. Compute 450 × 4.5 = 2025, so the equation becomes 2025 × Time / 100 = 81.

  4. Multiply both sides by 100: 2025 × Time = 8100.

  5. Solve for Time: Time = 8100 / 2025 = 4 years.

Answer: 4 years.

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