Two trains of equal are running on parallel lines in the same direction at 46 km/hr and 36 km/hr. The faster train passes the slower train in 45 sec. The length of each train is?  Pick one:
A) 50	B) 26	C) 27	D) 62.5	E) 21
Let the length of each train be x m.   Then, distance covered = 2x m.   Relative speed = 46 - 36= 
<gadget id="calculator">46 - 36</gadget>
<output>10</output>
10 km/hr.= 10 * 5/18 = 25/9 m/sec.   2x/45 = 25/9 =&gt; x = 65.5.   Answer: 62.5
<result>D</result>
Two trains of equal are running on parallel lines in the same direction at 46 km/hr and 36 km/hr. The faster train passes the slower train in 45 sec. The length of each train is?