A man can row upstream at 15 kmph and down strem 30 kmph. He takes 9 hours to row from lower point A to upper point B and back to A. What is the total distance traveled by him in 9 hours? He must return back to base point A in remaining time.	Choose the correct option:
A) 80	B) 120	C) 140	D) 180	E) 200
Upward distance traveled per hour - 15 km,   distance traveled after 6 hours = 90 km.   He remained with 3 hours travel downward, i.e. distance traveled in remaining 3 hours downward = 90 km   so total distance traveled from A to B and Back to point A = 90 km upward + 90 km downhill = 180 km   (Answer : 180)
<result>D</result>
A man can row upstream at 15 kmph and down strem 30 kmph. He takes 9 hours to row from lower point A to upper point B and back to A. What is the total distance traveled by him in 9 hours? He must return back to base point A in remaining time.