A man covered a certain distance at a speed of 8 Kmph and returned at a speed of 4 Kmph. Find the average speed of whole journey?	Choose the most appropriate option.
A) 5 2/3 Kmph
B) 5 1/3 Kmph
C) 5 4/3 Kmph
D) 6 1/3 Kmph
E) None
Option '5 1/3 Kmph'
<result>B</result>
A man covered a certain distance at a speed of 8 Kmph and returned at a speed of 4 Kmph. Find the average speed of whole journey?