SOLUTION: two planes start at the same time from the same point and fly in opposite directions. the first plane is flying 30 mph faster then the second plane. in 4v hours they are 2880 mi ap
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Question 585166: two planes start at the same time from the same point and fly in opposite directions. the first plane is flying 30 mph faster then the second plane. in 4v hours they are 2880 mi appart find the rate of the faster plane. Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! two planes start at the same time from the same point and fly in opposite directions. the first plane is flying 30 mph faster then the second plane. in 4v hours they are 2880 mi appart find the rate of the faster plane.
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Going in opposite directions, their speeds are added.
Relative speed = 2880/4v = 720/v
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r1 + r2 = 720/v
r1 = r2 + 30
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r2+30 + r2 = 720/v
2r2 = 720/v - 30 = (720 - 30v)/v
r2 = (360-15v)/v
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I suspect a typo.
