A sum of money becomes triple itself in 5 years at simple interest. How many years will it become six times at the same rate? Choose the correct choice from the following answers
A) 12 1/2
B) 12 1/6
C) 12 1/9
D) 12 1/5
E) 12 1/1
100 ---- 200 ---- 5   200 ---- 5   100 ---- 2 1/2   ------------------   600 ---- 12 1/2 years   12 1/2nswer: 12 1/2
<result>A</result>
A sum of money becomes triple itself in 5 years at simple interest. How many years will it become six times at the same rate?