Question

A certain sum of money doubles itself at simple interest in 8 years. In how many years will it be three times at the same rate? pls ans fast

Answer 1

principal =x
Interest =x 
x= x*8*r/100
r=100/8
2x= x*n*100/8 *1/100
2=100n/800 
1600=100n
n= 16 years