Two trains are running at 40 km/hr and 20 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 6 seconds. What is the length of the fast train?
Pick one:
A) 23 m
B) 33 (1/3)m
C) 27 (7/9)m
D) 29 m
E) 28 m
Relative speed = (40 - 20) km/hr =	(20 x(5/18))m/sec =	(50/9)m/sec.   Therefore Length of faster train =	((50/9)	x 6) m =	(300/9)m = 33	(1/3)	m.   33 (1/3)m
<result>B</result>
Two trains are running at 40 km/hr and 20 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 6 seconds. What is the length of the fast train?