Subject: General Aptitude · Chapter: Problems on Trains · Exam: 2009 · Marks: · Difficulty:
Two trains 240 metres and 270 metres in length are running towards each other on parallel lines, one at the rate of 60 kmph and another at 48 kmph. How much time will they take to cross each other?
Answer
Answer (as printed):
Explanation
Speed of the train relative to man = m/s = m/sec 33 11 100 18 360 = × km/hr = km/hr. 11 5 11 Let the speed of the train be x km/hr. Then, relative speed = (x – 3) km/hr. 360 360 393 8 \ x–3= ⇔x= +3= = 35 . 11 11 11 11 8 Hence, speed of train = 35 km/hr. 11
Explanation as extracted from the printed page; notation may be imperfect.