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 one-half of the distance traveled by bus. If he traveled by train, plane and bus, how many kilometers did he travel by bus?
Choose the correct choice from the following choices:
A) 700	B) 800	C) 900	D) 1000	E) 1100
total distance traveled = 1800 km.   distance traveled by plane = 600 km.   distance traveled by bus = x   distance traveled by train = x/2   x + x/2 + 600 = 1800   3x/2 = 1200   x = 800 km   The answer is 800.
<result>B</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 one-half of the distance traveled by bus. If he traveled by train, plane and bus, how many kilometers did he travel by bus?