Two trains are moving in the same direction at 72 kmph and 36 kmph. The faster train crosses a man in the slower train in 15 seconds. Find the length of the faster train? Answers.
A) 270  B) 277  C) 187  D) 257  E) 150
Relative speed = (72 - 36) * 5/18 = 2 * 5= 
<gadget id="calculator">2 * 5</gadget>
<output>10</output>
10 mps.   Distance covered in 15 sec= 15 * 10= 
<gadget id="calculator">15 * 10</gadget>
<output>150</output>
150 m.   The length of the faster train= 150 m.   Answer: 150
<result>E</result>
Two trains are moving in the same direction at 72 kmph and 36 kmph. The faster train crosses a man in the slower train in 15 seconds. Find the length of the faster train?