- 6√3
- 4√2
- 9
- 9√3

Option 4 : 9√3

**Given: **

A sum of money triples itself in 4 years at Compound interest

**Calculation: **

Let Principal was 1, It became 1 × 3 times = 3 in 4 years

Or 1 × √3 × √3 times = 3 in (2 + 2) = 4 years

Or 1 × √3 times in 2 years

Or 1 × √3 × √3 × √3 × √3 × √3 times in (2 + 2 + 2 + 2 + 2) = 10 years

Or 9√3 times in 10 years

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