This question looks like an "Average" question
but it is not simply adding together and divided by 2.
When the job is shared, the time taken will always be lesser as the workload will be shared.
Such questions are common in P5 and P6 exams.
Calculator usage is not allowed.
(Give your answer in hours using fraction in simplest form)
If the above question is easy, try to do the more challenging question below.