You drive a truck along a straight road for 8.4 km at 70 km/h, at which point the truck runs out
of petrol and stops. Over the next 30 min, you walk another 2.0 km farther along the road to a
petrol station
(a) Suppose that to pump the petrol, pay for it, and walk back to the truck takes you
another 45 min. What is your average speed from the beginning of your drive to your
return to the truck with the petrol?
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Answer:
I DON'T KNOW
Explanation:
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