Multiple choice

The simple interest on a sum of money will be 1620 after six years. If the principal is increased by 100% after three years, what will the total interest be after six years?

  1. Rs.2180

  2. Rs.2200

  3. Rs.2330

  4. Rs.2430

  5. Rs.2680

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Calculate interest for first 3 years on original principal (Pr × 3), then for next 3 years on doubled principal (2Pr × 3). Total = 3Pr + 6Pr = 9Pr. Given Pr = 270, total SI = 9 × 270 = Rs. 2430.