SOLUTION: Andy's average driving speed for a 4 hour trip was 45 miles per hour. During the first 3 hours he drove 40 miles per hour. What was his average speed for the last hour on his trip.

Question 304384: Andy's average driving speed for a 4 hour trip was 45 miles per hour. During the first 3 hours he drove 40 miles per hour. What was his average speed for the last hour on his trip.
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Andy's average driving speed for a 4 hour trip was 45 miles per hour. During the first 3 hours he drove 40 miles per hour. What was his average speed for the last hour on his trip.
average for total trip = 45 mph
trip was for 4 hours
distance traveled = 45*4= 180 miles
3 hours he drove a 40 mph= 120 miles
Balance 180-120 = 60 miles he drove in 1 hour
average speed for last hour = 60 mph
Ananth

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