Question 187981: If a balloon is ascending at 3 feet per second and another balloon is descending from 756 feet at 4 feet per second, at how many seconds will they meet?
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! If a balloon is ascending at 3 feet per second and another balloon is descending from 756 feet at 4 feet per second, at how many seconds will they meet?
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It's very unlikely they will meet, due to air currents.
Ignoring that, we can find when they'll be at the same altitude.
The faster balloon is gaining on the other one at the difference in speed, 4-3 = 1 ft/sec.
756/1 = 756 seconds.
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