SOLUTION: 4. A man travelled by a car for 3 days covering 480 km each day with an average speed of 10, 12 and 15 km per hour. What was his average speed?

Question 905292: 4. A man travelled by a car for 3 days covering 480 km each day with an average speed of 10, 12 and 15 km per hour. What was his average speed?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
480/3=160 km per day
We can't continue because we don't know how many hours he drove every day or even better the total number of hours he drove.
an average of 10 kph would mean he drove for 16 hours a day
an average of 15 kph is abt 11 hours per day
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