A man walk at 5 kmph uphill and 10 kmph downhill. He takes 6 hours to walk uphill from lower point A to upper point B and back to A. What is the total distance traveled by him in 6 hours?	Select.
A) 20
B) 22
C) 24
D) 30
E) 40
Uphill distance traveled per hour - 5 km,   distance traveled after 4 hours = 20 km.   He remained with 2 hours travel downhill, i.e. distance traveled in remaining 2 hours downhill = 20 km   so total distance traveled from A to B and Back to point A = 20 km uphill + 20 km downhill = 40 km   (Answer : 40)
<result>E</result>
A man walk at 5 kmph uphill and 10 kmph downhill. He takes 6 hours to walk uphill from lower point A to upper point B and back to A. What is the total distance traveled by him in 6 hours?