Subject: General Aptitude · Chapter: Problems on Trains · Exam: 2005 · Marks: · Difficulty:
A 100 m long train, takes 7 seconds to cross a man walking at the rate of 5 km/hr in the direction opposite to that of the train. What is the speed of the train?
Answer
Answer (as printed):
Explanation
Let the speed of the train be x km/hr. 5 Speed of the train relative to man = (x + 5) km/hr = ( x + 5) × 18 100 36 \ = ⇔ 10x + 50 = 500 ⇔ 10x = 450 ⇔ x = 45. 5 5 ( x + 5) × 18 Hence, speed of the train = 45 km/hr.
Explanation as extracted from the printed page; notation may be imperfect.