6 technicians take 10 hours to build the computer, meaning that it takes 60 worker-hours to build the server. Thus, 1 worker for 1 hour can build 1/60th of the server. The problem then says that 6 technicians begin work at 11:00 AM and work until 5:00 PM. In that six-hour time, 6 technicians should have put up 36/60ths. Then, from 5:00-6:00 PM, 7 technicians are working, adding 7 more 60ths for a total of 43 at 6:00 PM. From 6:00-7:00 PM, 8 technicians are working, adding 8 more 60ths for a total of 51 at 7:00 PM, and from 7:00 - 8:00 PM, 9 technicians are working, adding 9 more components to finish the server with 60 components at 8:00
"Start By Doing What Is Necessary ,Then What Is Possible & Suddenly You Will Realise That You Are Doing The Impossible"