Two trains, each 100 m long are moving in opposite directions. They cross each other in 8 seconds. If one is moving twice as fast the other, the speed of the faster train is	Options.
A) 75 km/hr	B) 60 km/hr	C) 35 km/hr	D) 70 km/hr	E) 80 km/hr
Total distance covered = 100+100= 
<gadget id="calculator">100+100</gadget>
<output>200</output>
200 m   Time= 8 s   let speed of slower train is v . Then the speed of the faster train is 2v   (Since one is moving twice as fast the other)   Relative speed = v + 2v = 3v   3v = 200/8 m/s = 25 m/s   =&gt; v = 25/3 m/s   Speed of the faster train = 2v = 50/3 m/s = (50/3)×(36/10) km/hr   = 5×36/3 = 5×12   = 60 km/hr   ANSWER:60 km/hr
<result>B</result>
Two trains, each 100 m long are moving in opposite directions. They cross each other in 8 seconds. If one is moving twice as fast the other, the speed of the faster train is