Verified Answer :

Simple,

6 hours Monday through Friday....

That's 5 days...thus..

6*5=30

Now, the employee also has 3.5 hours Saturday morning, so..

30+3.5=33.5

This employee, though, wants to work 40 hours. The employee has 30.5 so far, to find the rest...

40-33.5=6.5

Thus, the employee needs to work an additional 6.5 hours (h).

3 1/2 hour=3.5 hour
number of work hours=(6 hour/day)(5 days) +3.5 hour=30 hours+3.5 hours=
=33.5 hours.

number of hours that he must work=40 hours - 33.5 hours=6.5 hours

he must work  6.5 hours  (or 6 1/2 hours).