Question 898577
"if they work at the same rate?"  What do you mean?


Try it this way.
Let r = the rate for ONE man, assuming each man works at this rate.


{{{10r*14=4r*t}}}, doing the one job and using the uniform rate idea, RT=J for rate time job.  The factor used with the number r is for how many men are doing work, since the rate of any group is the sum of the individual rates, and all of them being r.  {{{t}}} is the time, unknown, in days for the group of four men.


Just solve for {{{t}}}.