Distinguish between instantaneous speed and average speed. A man drives a car a distance of 200km at an average speed of 44kmh-1. What must be his average speed fot the next 220 km if he is to cover the total distances in 9 hours?

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Divide 200 km by 44 kmh to determine the time it took to go that far. Subtract that from 9. That is the time remaining. Now, how fast must the driver go to travel 220 km in that remaining time? Divide 220 by the remaining time.

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