一题看不懂OG-138

freedownload

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 has 4/5 as many workers as the day crew, what fraction of all the boxes loaded by the two crews did the day crew load?

谢拉

freedownload

thank you very  much  !!!!!!!!!!!!!!!!!

SunnyApples

我们不妨设夜里的每人装载量为n,白天的为d. 那么有 n=(3/4)d

设人数为N,则有Nn=(4/5)Nd

那么夜里的总装载量就为d*(3/5)Nd,而白天的为d*Nd.

接下来算白天的占总共的比例自然很好算了~

好久没做数学了,过来凑个热闹~