Judy averaged 42 mph driving from Allentown to Harrisburg and 51 mph driving from harrisburg to Pittsburg.If she drove a…

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Judy averaged 42 mph driving from Allentown to Harrisburg and 51 mph driving from harrisburg to Pittsburg.If she drove a total of 288 miles in 6 hours then how long did it take her to drive from harrisburg to pittsburg?