A man traveled to his country home, a distance of 150 miles and then back. His average rate of speed going was 50 miles an hour and his average return speed was 30 miles per hour. His average rate of speed for the entire trip was:

Answer 1

It took him 150 miles / 50 mph = 3 hours to get there.

It took him 150 miles / 30 mph = 5 hours to get back.

In total, it took him 8 hours to travel 300 miles, so the average rate of speed is:

300 miles / 8 hours = ? mph