A and B can do a work in 4 hours and 12 hours respectively. A starts the work at 6 AM and they work alternately for one hour each. When will the work be completed? Choose the correct choice from the following:
A) 5	B) 4	C) 3	D) 2	E) 6
Work done by A and B in two hours, = First hour A + Second hour B = (1/4) + (1/12) = 1/3.   total time required to complete the work = 2 (3) = 6 days   ANSW6R 6
<result>E</result>
A and B can do a work in 4 hours and 12 hours respectively. A starts the work at 6 AM and they work alternately for one hour each. When will the work be completed?