Six technicians working at the same rate completely work of one server in 10 hrs. If they start at 11:00 am and one additional technician per hour being added beginning at 5:00 pm, at what time the server will be complete?

Since six technicians working at the same rate completely work of one server in 10 hours.

Now, from 11:00 am to 5 pm total man hours = 6X6 = 36

From 5 pm to 6 pm total man hours = 7

From 6 pm to 7 pm total man hours = 8

From 7 pm to 8 pm total man hours = 9

and the total of this stands for 60 hours

Hence the work will be completed at 8 pm.