Asked by sam
Mark averaged 60 miles per hour during the 30-mile trip to college. Because of heavy traffic he was able to average only 40 miles per hour during the return trip. What was Mark's average speed for the round trip?
Answers
Answered by
Reiny
time on first part = 30/60 = 1/2 hrs
time for return trip = 30/40 = 3/4 hrs
total time = 5/4 hrs
total distance = 60 miles
avg speed = 60/(5/4) = 48 mph
time for return trip = 30/40 = 3/4 hrs
total time = 5/4 hrs
total distance = 60 miles
avg speed = 60/(5/4) = 48 mph
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.