SOLUTION: A delivery truck left its terminal and traveled west at 40 mph, another truck left an hour later and traveled east at 50 mph. After how many hours was the second truck 400 miles fr
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Question 986588: A delivery truck left its terminal and traveled west at 40 mph, another truck left an hour later and traveled east at 50 mph. After how many hours was the second truck 400 miles from the first?
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
40 mi lead 1st truck
moving apart at 90mph
90x+40=400
90x=400-40
x=360/90
x=4 hrs
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