SOLUTION: 10. A truck and car leave a service station at the same time and travel in the same direction. The truck travels at 56mph and the car at 40mph. they can maintain radio contact with

Question 874895: 10. A truck and car leave a service station at the same time and travel in the same direction. The truck travels at 56mph and the car at 40mph. they can maintain radio contact within a range of 12 miles. When will they lose contact?
Found 2 solutions by reviewermath, mananth:
Answer by reviewermath(1029) (Show Source): You can put this solution on YOUR website!
Q:
A truck and car leave a service station at the same time and travel in the same direction. The truck travels at 56mph and the car at 40mph. they can maintain radio contact within a range of 12 miles. When will they lose contact?
A:
They will lose contact after x hours.
So 56x - 40x = 12
16x = 12
x = 12/16 = 3/4 hours = 45 minutes
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
they will contact when they are separated by 12 miles
truck ----------56 mph
car-------------40mph
difference = 16 mph
t=d/r
t= 12/16
=3/4 hour or 45 minutes
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