ChaseDream

标题: og 13 56题。。。求大家帮忙解答 [打印本页]

作者: 萧章may 时间: 2014-11-21 08:24
标题: og 13 56题。。。求大家帮忙解答
求详解谢谢～
我明白2:3:5:6
所以
if 2x＝30，x＝15
if 3x＝30，x＝10
if 5x＝30， x＝6
if 6x＝30， x＝5

为什么要2x+3x+5x+6x＝16x？谢谢大神后面的就不太明白了

56.Four staff members at a certain company worked on a project. The amounts of time that the four staff members worked on the project were in the ratio 2 to 3 to 5 to 6. If one of the four staff members worked on the project for 30 hours, which of the following CANNOT be the total number of hours that the four staff members worked on the project?

A. 80

B. 96

C. 160

D. 192

E. 240

欢迎光临 ChaseDream (https://forum.chasedream.com/)