Two trains travelling in the same direction at 70 and 35 kmph completely pass off another in 144 sec. If the length of the first train is 185 m, what is the length of the second train?	Select the correct option.
A) 1387 m	B) 1400 m	C) 1215 m	D) 1512 m	E) 185 m
RS =70 â€“ 35 = 35* 5/18 mps   T = 144 sec   D =35*5/18 * 144= 
<gadget id="calculator">35*5/18 * 144</gadget>
<output>1_400</output>
1400 m   185   --------   1215 m   Answer: 1215 m
<result>C</result>
Two trains travelling in the same direction at 70 and 35 kmph completely pass off another in 144 sec. If the length of the first train is 185 m, what is the length of the second train?