Exams › SSC CGL (Prelims) › General

A certain sum becomes 5 times itself in 12 years at simple interest. In how many years will it become 9 times itself at the same rate?

1. 20 years
2. 22 years
3. 24 years
4. 26 years

Correct answer: 24 years

Solution

If the sum becomes 5 times in 12 years, the simple interest earned in 12 years is 4 times the principal. So yearly interest is one-third of the principal. To become 9 times, the interest must be 8 times the principal, which takes 24 years.

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