Multiple choice

In how much time a sum of Rs.102400 amount to Rs.145800 at the rate of 12.5% per annum on compound interest?

  1. 5 year

  2. 4 year

  3. 3 year

  4. 7 year

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Using compound interest formula A = P(1 + r)^t: 145800 = 102400(1 + 0.125)^t. Solving: (1.125)^t = 145800/102400 = 1.4238. Taking logs or testing options: (1.125)^3 = 1.4238 exactly. Thus t = 3 years.

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