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 72 sec. The length of each train is?  Choose the correct choice from the following answers: A) 50 B) 26 C) 27 D) 28 E) 100
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/72 = 25/9 =&gt; x = 100.   Answer: 100
<result>E</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 72 sec. The length of each train is?