Problems on Trains on Arithmetic Aptitude related Questions and Answers

Question :   Two trains 126 m and 114 m long are running in opposite directions, one at the rate of 30kmph and another one at 42kmph. From the moment they meet will cross each other in 1. 12 s 2. 14 s 3. 16 s 4. 18 s Answer :   1 - 12 s