A man traveled a total distance of 1800 km. He traveled one-third of the whole trip by plane and the distance traveled by train is two-thirds of the distance traveled by bus. If he traveled by train, plane and bus, how many kilometers did he travel by bus?	Answers:	A) 660	B) 680	C) 720	D) 760	E) 800
total distance traveled = 1800 km.   distance traveled by plane = 600 km.   distance traveled by bus = x   distance traveled by train = 2x/3   x + 2x/3 + 600 = 1800   5x/3 = 1200   x = 720 km   The answer is 720.
<result>C</result>
A man traveled a total distance of 1800 km. He traveled one-third of the whole trip by plane and the distance traveled by train is two-thirds of the distance traveled by bus. If he traveled by train, plane and bus, how many kilometers did he travel by bus?