Re: 6 workers should finish a job in 8 days. After 3 days came 4

Let Rate of one worker be R
=> (6*R)*8 = 1 (Rate * Time = work)
=> R = 1/48
=> Work remaining after 3 days
1 - (3*6)/48 = 30/48

After 4 ppl joined in
((6+4)*Time)/48 = 30/48
Time = 3 days to finish the task
IMO A