math
posted by Jen .
Carl drove from his house to work at an average speed of 35 miles per hour. The drive took him 25 minutes. If the drive home took him 30 minutes and he used the same route in reverse, what was his average speed going home?

His return speed was 5/6 times his speed going there, since he took 6/5 as long coming back.
(5/6) x 35 = 29.17 mph