How long will ₹1 lakh take to double at 6%, 8% and 10% interest?

If a person invests ₹1 lakh at 6% annual interest, it could take around 12 years to become ₹2 lakh. At 8% interest, the same amount could double in about nine years, while at 10% interest, it could take around 7.2 years. These figures are estimates based on annual returns remaining constant throughout the investment period.