SOLUTION: A car travelled a distance of 180miles. It covered the first 20miles at 40mph and 80miles at 60mph. The rest of the journey averaged 40mph. How long did the journey take?

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Question 1000639: A car travelled a distance of 180miles. It covered the first 20miles at 40mph and 80miles at 60mph. The rest of the journey averaged 40mph. How long did the journey take?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
A car travelled a distance of 180miles. It covered the first 20miles at 40mph and 80miles at 60mph. The rest of the journey averaged 40mph. How long did the journey take?
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d = r*t
t = d/r
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Find the 3 times for the 3 segments.
Add them.