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Mark averaged 60 miles per hour during the 30-mile trip to college. Because of heavy traffic he was able to average only 40 mil...Asked by Anonymous
Mark averaged 60 miles per hour during the 30 mile trip to college. Because of heavy traffic he as able to average only 20 miles per hour during the return trip. What was Mark's average speed for the round trip?
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Anonymous
1/2 hour to get there
1.5 hours back
total 2 hours for 60 miles
so 30 miles/ hour
1.5 hours back
total 2 hours for 60 miles
so 30 miles/ hour
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