A 270 metres long train running at the speed of 120 kmph crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds. What is the length of the other train?  Choose the correct option:
A) 180	B) 210	C) 230	D) 240	E) 280
Relative speed = (120 + 80) km/h =200x 5/18 m/s   = 500/ 18 m/sec   Let the length of the other train be x metres.   Then, x + 270/9 = 500/9   x + 270 = 500   x = 230.   Answer: 230
<result>C</result>
A 270 metres long train running at the speed of 120 kmph crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds. What is the length of the other train?