Multiple choice

A sum of money invested at simple interest triples itself in 8 years. How many times of itself will it become in 20 years?

  1. 6

  2. 5

  3. 8

  4. 12

  5. 4

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

Let us assume that money invested is X and it becomes triple @ r % in 8 years. So, interest + principle = 3X, i.e. X * r * 8/100 + X = 3X => r = 25 % Now in 20 years, interest + principle = X(1 + 25 * 20/100) = 6X, i.e. 6 times of the sum invested. So, option 1 is correct.