SOLUTION: Two missiles speed directly toward each other, one at 9,000 mph and the other at 21,000 mph. If they start 1,317 miles apart, how far apart are they on minute before they collide?

Question 154987: Two missiles speed directly toward each other, one at 9,000 mph and the other at 21,000 mph. If they start 1,317 miles apart, how far apart are they on minute before they collide?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Two missiles speed directly toward each other, one at 9,000 mph and the other at 21,000 mph. If they start 1,317 miles apart, how far apart are they on minute before they collide?
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Find the closing rate: 9000+21000 = 30,000 mph
Change to miles per minute: 30,000/60 = 500 miles per minute
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How far apart are they one minute before they collide?
Ans: 500 miles
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Cheers,
Stan H.
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