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Xiao-bin, and insist on running every morning, Xiao-Ming, Xiao-bin running 4 meters per second, runn

Wen Shu Tong2010-01-29 22:01:50 +0000 #1
(1) if they stood 100 meters at the same time opposite starting at both ends of the runway, then the two men met after a few seconds ? (2) If Xiao Ming stood at 100 meters from the runway, Xiao-bin stands 10 meters in front of him, both for the same time to start, after a few seconds to keep up with Xiao-Ming Xiao-bin?
fun_0072010-01-29 22:03:49 +0000 #2
1 . 10 seconds after the encounter

25 seconds to catch up

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