Alan's average speed on his drive home is 27 mph
Since Alan drives to school at an average speed of 40 miles per hour and school is 16 miles from home, we need to find the time it takes Alan to get to school.
Since distance = speed × time
time = distance/speed = 16 miles/40 mph = 0.4 hours.
Since the total trip takes 1 hours, the time it takes alan to drive back home is total time - time to reach school = 1 - 0.4 = 0.6 hours.
Since the distance from school to home is 16 miles and it takes 0.6 hours to return home,
Alan's average speed on his drive home v = distance/time = 16 miles/0.6 hours = 26.67 mph ≅ 27 mph
So, Alan's average speed on his drive home is 27 mph
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