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एक रेलगाड़ी 36 किमी / घंटा की रफ़्तार से दौड़ रही है यदि यह रेलगाड़ी एक खम्भे को 25 सेकंड में पार कर तो इसकी लम्बाई ज्ञात कीजिए ?
A. 248 m
B. 250 m
C. 255 m
D. 260 m

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Correct Answer - B
(b) We know when a train crosses a pole/man/tree in these cases it crosses itself (हम जानते है की जब एक ट्रैन किसी खम्भे को या किसी व्यक्ति को या किसी पेड़ को पार करती है तो वह अपनी लम्बाई के बराबर दूरी तय करती है )
Therefore,
Length of the train (ट्रैन की लम्बाई ) `="Speed " xx "time"`
`implies` Length `=36xx(5)/(18)xx25`
=250 metre
`therefore` length of train (ट्रैन की लम्बाई )=250 metre

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