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

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**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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