A train 108 m long moving at a speed of 50 kmph crosses a train 112 m long coming from opp direction in 6 seconds.The speed of the second train is
Choose the correct choice.
A) 48 kmph B) 54 kmph C) 66 kmph D) 82 kmph E) 69 kmph
both trains are moving in opposite direction means we need to add their speeds.   i.e: 1st train speed is = 50kmph   let the 2nd train speed = x kmph   relative speed = (50+x) kmph   = (50+x)* 5/18   = (250+5x)/18 m/sec   Distance covered by two trains = 108+112= 
<gadget id="calculator">108+112</gadget>
<output>220</output>
220m   therefore, 220/((250+5x)/18)= 6   =&gt; 250+5x=660   =&gt; x=82km/hr.   ANSWER:82 kmph
<result>D</result>
A train 108 m long moving at a speed of 50 kmph crosses a train 112 m long coming from opp direction in 6 seconds.The speed of the second train is