Question
Download Solution PDFएक ट्रेन 12 सेकंड में एक खंभे को और 36 सेकंड में 170 मीटर की लंबाई के पुल को पार कर सकती है। तो ट्रेन की चाल है:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFप्रयुक्त सूत्र:
चाल = दूरी / समय
(1 मीटर/सेकंड) × (18/5) = 1 किमी/घंटा
Shortcut Trickयदि ट्रेन 12 सेकंड में अपनी लंबाई और 170 मीटर पुल को (36 - 12 = 24) सेकंड में पार कर लेती है।
ट्रेन की चाल = [170/24] × [18/5] = 25.5 किमी/घंटा
Alternate Method
मान लीजिए ट्रेन की लंबाई x मी है।
जैसा कि हम जानते हैं,
चाल = दूरी/समय
चाल = x/12 ---(1)
चाल = (x + 170)/36 ---(2)
समीकरण (1) और समीकरण (2) से
x/12 = (x + 170)/36
⇒ 3x = x + 170
⇒ 2x = 170
⇒ x = 170/2
⇒ x = 85 मी
समीकरण (1) से
चाल = 85/12 × (18/5) किमी/घंटा
∴ चाल = 25.5 किमी/घंटाLast updated on Jun 10, 2025
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