Question 542057
Trick question? You don't earn interest when you borrow. You PAY interest. So... never?? :)
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Now suppose you invested $600 at 10%, how long would it take you to earn $30?
Start with - how much do you make per year?
{{{x=p*i}}}
{{{x=600*.10=60}}}
So you make $60/year. If you make $60/year, how long will it take to make $30?
{{{y=30/60=0.5}}}
So it take half a year. How many months is that?
{{{m=y*12}}}
{{{m=0.5*12=6}}}