If Rs.1000 be invested at interest rate of 5% & the interest be added to the principal every 10 yrs, then the no. of yrs in which it will amount to Rs.2000 is:  Choose the correct choice from the following choices
A) 14 years
B) 15 years
C) 16 2/3 years
D) 17 years
E) 18 years
Total time= (10+6 2/3) = 16 2/3 years   16 2/3 years
<result>C</result>
If Rs.1000 be invested at interest rate of 5% & the interest be added to the principal every 10 yrs, then the no. of yrs in which it will amount to Rs.2000 is: