direction on parallel tracks at 98 km/hr and 170 km/hr respectively. A man noticed that it took exactly 15 seconds for the faster train to pass by him. What is the length of the faster train?
A210 mCorrect AnswerIncorrect Answer
B225 mCorrect AnswerIncorrect Answer
C300 mCorrect AnswerIncorrect Answer
D280 mCorrect AnswerIncorrect Answer
ENone of theseCorrect AnswerIncorrect Answer
Solution
Relative speed = (170 – 98) km/hr = 72 km/hr => 72 × (5/18) = 20 m/sec Length of the faster train = 20 × 15 = 300 m
