og12 ps 138

Kath1985

138. At a loading dock, each worker on the night crew loaded 3/4 as many boxes as each worker on the day crew. If the night crew has4/5 as many workers as the day crew, what fraction of all the boxes loaded by the two crews did the day crew load?
(A)1/2
(B)2/5
(C)3/5
(D)4/5
(E)5/8
答案E
想請問:
1.黃色部分的意思為何?
2.本題解法
感謝

zwhjzwhj

the number of boxes loaded by worker( night crew) =3/4 number of boxes loaded by worker (day crew)
the number of workers in night crew=4/5 number of workers in day crew

number of boxes loaded per worker(day):b
number of workers(day): w

wb  /   (3/4 b*4/5w)+wb=5/8

-- by 会员 Gail小M (2011/2/23 19:56:50)

看来我数学是真的不行了
这是解的什么意思啊完全没看懂，
怎么又跟per worker，per day有关了呢？？？晕了


what fraction of all the boxes loaded by the two crews did the day crew load?

我觉得题目是问2个crews做的比上day crew做的，为什么答案是反的呢？？？

xix627

我懂题的意思，可是fraction到底让求的是什么我就不懂了
哪位能解释一下换成中文是问什么呢？
谢谢大家了

Kath1985

終於懂了 thx

Kath1985

請問題目中這句怎麼翻譯呢-->what fraction of all the boxes loaded by the two crews did the day crew load

Gail小M

hahahah...blablablabla....呼应下ls....

cyclone526

楼上解法很对。
 黄色部分的意思是说，我就直接最通俗的说了啊。在装货码头上，每个上晚班人装货的数量是上白班的人的四分之三。如果晚上上班的人总数是白天上班四分之五，BALBALABALA.。。

Gail小M

the number of boxes loaded by worker( night crew) =3/4 number of boxes loaded by worker (day crew)
the number of workers in night crew=4/5 number of workers in day crew

number of boxes loaded per worker(day):b
number of workers(day): w

wb  /   (3/4 b*4/5w)+wb=5/8