<PRE><B>Question 942329</B>
John was on a 10 mile track, he walked at a rate of 3 mph then rode the rest on his bike at a rate of 12 mph, if it took him an hour to go around the track how long did he walk for?
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let x=distance John walked
10-x=distance John rode his bike
travel time=distance/speed
..
{{{x/3+(10-x)/12=1}}}
lcd:12
4x+10-x=12
3x=2
x=2/3 mile (distance John walked)
(2/3)/3=2/9 hr
how long did John walk for? 2/9 hr


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