SOLUTION: one airplane travelling at 500 miles per hour, a second airplane leaves 30 minutes later travelling at 600 miles per hour, how long before the second airplane overtakes the first a

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Question 359562: one airplane travelling at 500 miles per hour, a second airplane leaves 30 minutes later travelling at 600 miles per hour, how long before the second airplane overtakes the first airplane? Both airplanes are going in the same direction, same height and same wind speed.
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
one airplane travelling at 500 miles per hour, a second airplane leaves 30 minutes later travelling at 600 miles per hour, how long before the second airplane overtakes the first airplane? Both airplanes are going in the same direction, same height and same wind speed.
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It's not height, it's altitude. A plane's height is measured when it's parked. The altitude is not relevant to the problem anyway.
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In 1/2 hour, the 1st plane has gone 250 miles.
The 2nd plane is gaining on the 1st at 100 mph (600-500), or the speed of the 2nd plane relative to the 1st is 100 mph.
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250/100 = 2.5 hours

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