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你回答正确了吗?问题的答案就在2015年第2期的E-News中。

2015-03-30

西瓜的重量是多少呢?

Riddle: Watermelons
西瓜的重量是多少呢?

一辆卡车装载了1000公斤的西瓜,且西瓜里99%是水分。当卡车到达目的地时,西瓜的含水量变成了98%。那么,到达目的地后西瓜的重量是多少呢?

 


解决方案

西瓜的重量减少了一半。以下是解决方案:

1000公斤:99%=990公斤,这参考卡车上西瓜重量的总的含水量。然而,只有10%公斤的重量(非含水量),是整个车程中不变的。

到达目的地后,10公斤变为西瓜总重量的2%。这意味着5公斤等于1%,那么100%就等于500公斤。


 


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