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 25 seconds. Find the length of the faster train?  Choose the correct choice:
A) 270
B) 250
C) 187
D) 257
E) 271
Relative speed = (72 - 36) * 5/18 = 2 * 5= 
<gadget id="calculator">2 * 5</gadget>
<output>10</output>
10 mps.   Distance covered in 25 sec= 25 * 10= 
<gadget id="calculator">25 * 10</gadget>
<output>250</output>
250 m.   The length of the faster train= 250 m.   Answer: 250
<result>B</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 25 seconds. Find the length of the faster train?