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Both A and B at 300 meters circular track practice running

151577663072010-03-23 20:12:03 +0000 #1
A and B two 300-meter circular track on the practice run, a speed of 6 m / s, B's speed is 7 m / s, if A. B two the same time and ran the same direction, B can be the first time after running a few laps to catch up with A?
の灏2010-03-23 20:17:20 +0000 #2
相对速度1米每秒,追上要300秒,300秒甲跑了6圈,乙多一圈,7圈
taiyangqihuo2010-03-23 20:21:27 +0000 #3
300/((300/6-300/7 ) * 7) = 6

/ is in addition to number * is a multiplication sign

A lap with the 300 / 6 seconds to run a lap with the B 300 / 7 seconds

A must for every lap multi-purpose (300/6-300/7) time.

Will be the time to be multiplied by 7 for each lap, when a B can be more than the number of meters run. Then divided by the distance difference 300 to get 6 laps.
Lan Wang QQ2010-03-23 20:35:18 +0000 #4
7

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