Question
Download Solution PDFWhat is the combined length of two trains when one, moving at 80 km/hr, crosses another, travelling in the same direction at 44 km/hr in 40 seconds ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Train A speed = 80 km/hr
Train B speed = 44 km/hr
Time taken to cross each other = 40 seconds
Formula used:
Relative speed when moving in the same direction = Speed of Train A - Speed of Train B
Distance = Relative Speed × Time
Calculation:
Relative Speed = 80 km/hr - 44 km/hr
⇒ Relative Speed = 36 km/hr
Convert km/hr to m/s:
⇒ 36 km/hr = 36 × (1000/3600) m/s
⇒ 36 km/hr = 10 m/s
Distance = Relative Speed × Time
⇒ Distance = 10 m/s × 40 s
⇒ Distance = 400 m
∴ The correct answer is option 2.
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