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Quantitative Aptitude (Level Easy)
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Two trains move in the same direction at 50 Kmph and 32 Kmph respectively. A man in the slower train observes the 15 seconds elapse before the faster train completely passes by him. What is the length of faster train?
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A
75m
💡 Explanation:
When two objects move in the same direction, their relative speed is the difference of their speeds. Here, relative speed = 50 - 32 = 18 kmph = 5 m/s. In 15 seconds, the faster train covers length = relative speed × time = 5 × 15 = 75m. This is the length needed for the faster train to completely pass the observer.