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 answer
A) 20 years  B) 17 years  C) 97 years  D) 27 years  E) 29 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?