一道DS求大神解惑

jinyhe · 发表于 2020-10-17 16:11:19

Machine M, working alone at its constant rate, produces x widgets every 4 minutes. Machine N, working alone at its constant rate, produces y widgets every 5 minutes. If machines M and N work simultaneously at their respective constant rates for 20 minutes, does machine M produce more widgets than machine N in that time?

(1) x > 0.8y
(2) y = x + 1

这道题发出来的一瞬间就搞明白了。。留给剩下的童鞋看看。。

长丝弓 · 发表于 2020-10-18 04:57:51

x/4*20>y/5*20?
=>5x>4y?
=>x>0.8y?
选A. 楼主明白就好啦

一道DS求大神解惑

所属分类: GMAT考试

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