Problema Solution
Tommy drove 60 miles from his house to school at 30 mph and drove back home over the same route at 60 mph. What was the average speed for the entire trip?
Answer provided by our tutors
average speed v = total distance/total time
the total distance = 60 + 60 = 120 mi
since speed = distance/time follows time = distance/speed
the total time = 60/30 + 60/60 = 3 hr
v = 120/3
v = 40 mph
the average speed of the entire trip was 40 mph.