英语奥数,高手请进!

题目

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?
帮忙翻译下,请写出详细过程,小生将感激不尽!

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