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 30 kmph and another one at 42 kmph. From the moment they meet will cross each other in 1. 8 s 2. 10 s 3. 12 s 4. 14 s Answer :   3 - 12 s