2010-01-30 13:02:06 +0000 #1
2010-01-30 13:15:17 +0000 #2
Solution: Let x minutes to meet one.
Then the strong-strong at this time ran 150x rice, Liang-liang ran 200x meters,
Liang-liang more than the strong-strong 400-meter run,
200x-150x = 400,
x = 8.
A: meet once every 8 minutes.
Then the strong-strong at this time ran 150x rice, Liang-liang ran 200x meters,
Liang-liang more than the strong-strong 400-meter run,
200x-150x = 400,
x = 8.
A: meet once every 8 minutes.