5 lakhs can be made into 15 lakhs
There is nothing to make 5 lakhs into 15 lakhs. Rs.5 lakh has to be deposited in Post Office FD for 5 years. Post office offers 7.5 percent interest rate for 5 year FD. After 5 years, the maturity amount will increase to Rs.7,24,974. But this amount does not have to be withdrawn. Rather, it has to be deposited again for the next 5 years. This way, in 10 years, you will get Rs. 5,51,175 from the interest on 5 lakhs, and your amount will become Rs.10,51,175