SOLUTION: A certain sum doubles in 3 years under simple interest. In how many years will the sum become 5 times itself?
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Question 1096403: A certain sum doubles in 3 years under simple interest. In how many years will the sum become 5 times itself?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
After 3 yrs you end up with , so
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yrs
Divide both sides by
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For the sum to get multiplied by ,
and
In 12 yrs the sum gets multiplied by
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