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OpenStudy (anonymous):
A car travels for an hour at a speed of 20 km/r, the next two hours at a speed of 65 km/r and the final hour at a speed of 85 km/r. What is the average speed of the car for the entire trip?
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OpenStudy (anonymous):
|dw:1405400349791:dw|
OpenStudy (anonymous):
In the first hour how many km did the car travel?
OpenStudy (anonymous):
yes I am still here waiting for your response.
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