Correct Answer: Option A
P can complete the work in (12 x 8) hrs. = 96 hrs.
Q can complete the work in (8 x 10) hrs. = 80 hrs.
P's1 hour's work =1/96 and Q's 1 hour's work =1/80.
So, (P + Q)'s 1 hour's work = (1/96 + 1/80) = 11/480.
So, both P and Q will finish the work in (480/11) hrs.
Therefore, Number of days of 8 hours each = (480/11 x 1/8)
= 60/11 days = 5(5/11) Days.
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