Two trains travelling in the same direction at 60 and 42 kmph completely pass off another in 1 minute. If the length of the first train is 120 m, what is the length of the second train?  Choose the correct choice from the following answers.
A) 228  B) 266  C) 175  D) 180  E) 171
RS = 60 â€“ 42 = 18 * 5/18= 
<gadget id="calculator">18 * 5/18</gadget>
<output>5</output>
5 mps   T= 60 sec   180 = 5 * 60= 
<gadget id="calculator">5 * 60</gadget>
<output>300</output>
300 m   120   --------   180 m   Answer: 180
<result>D</result>
Two trains travelling in the same direction at 60 and 42 kmph completely pass off another in 1 minute. If the length of the first train is 120 m, what is the length of the second train?