A certain sum of money doubles itself in 10 years in how much many years will it trible itself at the same rate?	Choose the correct choice from the following answers:
A) 20 years  B) 26 years  C) 88 years  D) 66 years  E) 12 years
100 ---- 100 --- 10   100 --- 10   --------------------   300 ---- 20 years   20 yearsnswer: 20 years
<result>A</result>
A certain sum of money doubles itself in 10 years in how much many years will it trible itself at the same rate?