A certain sum becomes 8 times of itself in 3 years when it is invested at the R% per annum compounded annually. If the same principal amount is invested at simple interest of R% per annum. In how many years does a certain sum become 10 times itself when it is invested at the simple rate of interest of R% per annum?
1
9 years
2
8 years
3
10 years
4
3 years
5
Question Not Attempted