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5. A, B and two 400 m long circular track running, is known to run a 9 meters per second, B 7 meters

Small fart think children2010-04-06 22:10:45 +0000 #1

jxx20052010-04-06 22:16:46 +0000 #2
you asked is this?

(1) the same time and place when the two rows back and, after ___ seconds of their first encounter;

(2) both same time and in the same direction while the rows, two seconds off ____ people first met.

1) 400 / (9 +7) = 25 seconds to 2) 400 / (9-7) = 200 sec
dark の died sector2010-04-06 22:53:33 +0000 #3
title did not write the whole bar, ask what you want?
Along with making stuff2010-04-06 22:21:30 +0000 #4
you did not write the whole, add to the problem

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