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 10 seconds. Find the length of the faster train?  Choose the correct choice:  A) 270  B) 288  C) 100  D) 299  E) 126
Relative speed = (72 - 36) * 5/18 = 2 * 5= 
<gadget id="calculator">2 * 5</gadget>
<output>10</output>
10 mps.   Distance covered in 27 sec= 10 * 10= 
<gadget id="calculator">10 * 10</gadget>
<output>100</output>
100 m.   The length of the faster train= 100 m.   Answer: 100
<result>C</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 10 seconds. Find the length of the faster train?