A sum of money doubled itself at certain rate of compound interest in 15 years In how many years wil...........

Quantitative Aptitude (MTS) Compound Interest

A sum of money doubled itself at certain rate of compound interest in 15 years. In how many years will it become four times of

itself?

This questions was previously asked in

SSC MTS 26th October 2021 Shift-1

- Consider the compound interest formula. If a sum doubles in 15 years, it means any amount that grows at this rate will take 15 years to double.

- To become four times, the amount must double twice (i.e., double once to become twice, then double again to become four times).

- Each doubling takes 15 years.

- Therefore, to become four times, it would take 15 years + 15 years = 30 years.

Option 2: 30 is the correct answer.

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