Explanation:
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Average speed of the driver is given as

if he moved for total time t = 3.5 hours
so the distance between the tow is given as



so the distance between St. Louis and Chicago is 224 miles
The object's speed will remain constant after the it leaves his hand.
So will HIS speed in the opposite direction.
It is wasted, most likely as light, in this case, or it is lost during the transport of electricity.