Multiple choice general knowledge math & puzzles

How long will it take for a sum of money to grow from Rs.1250 to Rs.10000, if it is invested at 12.5% p.a simple interest?

  1. 8

  2. 64

  3. 72

  4. 56

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

Using Simple Interest = Principal × Rate × Time / 100, we get 8750 = 1250 × 12.5 × T / 100. Solving: 8750 = 156.25T, so T = 8750 / 156.25 = 56 years. Option D is correct.