Posted by Bob on Wednesday, August 25, 2010 at 2:39pm.
drove from rich to boston at avg speed of 50 mph,if it took 5 hrs to drive from rich to phila at an avg speed of 70 mph and if the whole trip took 13 hrs how far is it from phila to boston?

math  Ms. Sue, Wednesday, August 25, 2010 at 2:56pm
Answered earlier today:
http://www.jiskha.com/display.cgi?id=1282735117

math  drwls, Wednesday, August 25, 2010 at 2:56pm
"Rich?" Is that supposed to be Richmond VA?
Rich to Phila distance = 70x5 = 350 miles
Boston to Phila distance = X
(X + 350)/13 = 70 mph
Solve for X
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