If is known that, if the interest i s compounded continuously, the principal changes f the rate equal to the product of the rate of bak interest per annum, and the principal. If the interest is compounded continuously at 5% per annum, in how many years will Rs. 100 double itself? At what interest rate will Rs. 100 double itself in 10 years `((log)_e2=0. 6931)` How much will Rs. 1000 be worth at 5% interest after 10 years? `(e^(0. 5)=1. 648)dot`

Answer

(i) `6*9%` (ii) Rs. 1648.