A sum of money becomes triple itself in 5 years at simple interest. How many years will it become five times at the same rate? Choices:
A) 12 Â½ years  B) 62 Â½ years  C) 18 Â½ years  D) 10 Â½ years  E) 12 Â½ years
100 ---- 200 ---- 5   200 ---- 5   100 ---- 2 1/2   ------------------   500 ---- 10 Â½ years   Answer:10 Â½ years
<result>D</result>
A sum of money becomes triple itself in 5 years at simple interest. How many years will it become five times at the same rate?