英语奥数,高手请进!Tom,Billy and Mike plant trees in A and B.They should plant 900trees in A,A and 1250 Trees in B.We knowTOM billy and MIKE trees respectively24,30,32,every day.Tom plant trees in A ,then plant inB ,The two pieces of lands beg
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英语奥数,高手请进!Tom,Billy and Mike plant trees in A and B.They should plant 900trees in A,A and 1250 Trees in B.We knowTOM billy and MIKE trees respectively24,30,32,every day.Tom plant trees in A ,then plant inB ,The two pieces of lands beg
英语奥数,高手请进!
Tom,Billy and Mike plant trees in A and B.They should plant 900trees in A,A and 1250 Trees in B.We knowTOM billy and MIKE trees respectively24,30,32,every day.Tom plant trees in A ,then plant inB ,The two pieces of lands begin and end at the same time.When should Billy turn from A to B?
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英语奥数,高手请进!Tom,Billy and Mike plant trees in A and B.They should plant 900trees in A,A and 1250 Trees in B.We knowTOM billy and MIKE trees respectively24,30,32,every day.Tom plant trees in A ,then plant inB ,The two pieces of lands beg
Tom,Billy 和Mike三人在AB地种树
A地要植900棵
B地植1250棵
Tom,Billy 和 Mike每天分别种24棵30棵32棵
Tom在A地种
Mike在B地种
Billy先再A地种又跳到B地两块地同时开始同时结束
Billy应在开始后几天转到B地
由题意得：三人同时开工同时完工,
即有,（1250+900）/（24+30+32）=25
设,Billy在开始X天后去B地,在B地继续开工Y天,
则有：X+Y=25
另有：24X+30X+24Y=900
32Y+30Y+32X=1250
解方程组,则,X=10,Y=15