Problem Solving (PS) | Re: It takes 6 technicians a total of 10 hours to build and

RT = W
6r10 = W
r =W /60

Technically Speaking, you require 60 man hours for the job which is the essence of the last equation.
Now From 11 AM to 5 PM . 6*6 = 36 manhours are already given.
So Remaining 60 - 36 = 24 hrs have to be done.

5-6 => 7 man hours
6-7 => 8 man hrs
7-8 => 9 man hrs

SO total = 7+8+9 = 24 hrs
Hence Answer = 8 PM.

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