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 from the following answers:
A) 17 km/hr B) 18 km/hr C) 60 km/hr D) 16 km/hr E) 11 km/hr
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 km/hr
<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?