Two trains, each 100 m long, moving in opposite directions, cross other in 8 sec. If one is moving twice as fast the other, then the speed of the faster train is?  Choose the correct choice:
A) 29
B) 29
C) 60
D) 19
E) 12
Let the speed of the slower train be x m/sec.   Then, speed of the train = 2x m/sec.   Relative speed = ( x + 2x) = 3x m/sec.   (100 + 100)/8 = 3x =&gt; x = 25/3.   So, speed of the faster train = 50/3 = 50/3 * 18/5= 
<gadget id="calculator">50/3 * 18/5</gadget>
<output>60</output>
60 km/hr.   Answer:60
<result>C</result>
Two trains, each 100 m long, moving in opposite directions, cross other in 8 sec. If one is moving twice as fast the other, then the speed of the faster train is?