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April 19, 2015

April 19, 2015

Posted by **karon** on Tuesday, December 13, 2011 at 9:14pm.

- algebra -
**bobpursley**, Tuesday, December 13, 2011 at 9:41pmP-20=F

timefreight= distance/rate=200/F

timepassenger= 300/P

but 300/P=200/F

200P=300F

200P=300(P-20)

solve for P, the speed of the passenger train,then solve for F

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