A sum of money becomes double itself in 8 years at simple interest. How many times will it become 10 years at the same rate?
Choose one:  A) 10  B) 99  C) 87  D) 66  E) 12
P ---- 2P ---- 8 years   2 1/4 P ---- 10 years   10nswer: 10
<result>A</result>
A sum of money becomes double itself in 8 years at simple interest. How many times will it become 10 years at the same rate?