Two trains, each 100 m long, moving in opposite directions, cross each other in 8 seconds. If one is moving twice as fast the other, then the speed of the faster train is:
Select the correct option.
A) 30 km/hr  B) 45 km/hr  C) 60 km/hr  D) 75 km/hr  E) 65 km/hr
Let the speed of the slower train be x   and the faster train = 2x   Relative speed = x+2x = 3x   therefore (100+100)/8 = 3x   =&gt; x = 25/3   So, Speed of the faster train = 2(25/3) = 50/3 m/s = (50/3*18/5)km/hr = 60km/hr   ANSWER:60 km/hr
<result>C</result>
Two trains, each 100 m long, moving in opposite directions, cross each other in 8 seconds. If one is moving twice as fast the other, then the speed of the faster train is: