SOLUTION: A car traveled from A to B in 6 hours. Its average speed for the first three hours was 60 mph, and for the last three it was 40 mph. Find the average speed for the whole trip.

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Question 898502: A car traveled from A to B in 6 hours. Its average speed for the first three hours was 60 mph, and for the last three it was 40 mph. Find the average speed for the whole trip.
Answer by Edwin McCravy(20055) About Me  (Show Source):
You can put this solution on YOUR website!
A car traveled from A to B in 6 hours. Its average speed for the first three
hours was 60 mph, and for the last three it was 40 mph. Find the average speed
for the whole trip.
We will use:

Its average speed for the first three hours was 60 mph

for the last three it was 40 mph

matrix%281%2C5%2Ctotal%2Cdistance%2C%22%22=%22%22%2C180%2B120=300%2Cmiles%29

matrix%281%2C5%2Ctotal%2Ctime%2C%22%22=%22%22%2C3%2B3=6%2Chours%29



Edwin