Question

请各位解答这道IQ题

If one worker can complete ajob in 6 days and asecond worker takes 12 days to complete the same job. how long will it take them working together?

Answer 1

4 days

Answer 2

The first worker can do 1/6 of the job, while the second worker can do 1/12. So they can do 1/4(1/6+1/12=1/4) of the job. It means they will take 4 days to complete the whole job.

Answer 3

如果一名工人的报酬可以完成在6天,第二职工以完成相同的12日要花多长时间那他们一起工作?
不懂 大概答案是 6天把？