Two trains of length 120 meter and 150 meter crosses a stationary man in 10 and 15 seconds respectively. In what time they will cross each other when they are moving in same direction.
Select:
A) 120 sec  B) 125 sec  C) 135 sec  D) 140 sec  E) None of these
Explanation :   120 = a*10, a = 12 m/sec (speed of first train)   150 = b*15, b = 10 m/sec (speed of second train)   270 = (2)*T, T = 135 seconds   Answer – 135 sec
<result>C</result>
Two trains of length 120 meter and 150 meter crosses a stationary man in 10 and 15 seconds respectively. In what time they will cross each other when they are moving in same direction.