<PRE><B>Question 271183</B>
Two cars are traveling 55 mph at each other and are 500 feet apart. How long does it take for them to meet?
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closing speed = 110mph
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500 ft = 500/5280 mi 
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time = distance/rate = (500/5280)/110 = 0.0008609 hrs = 0.05165 second
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Cheers,
Stan H.</PRE>