একটি ট্রেন 27 সেকেন্ডে 375 মিটার দীর্ঘ একটি প্ল্যাটফর্মকে অতিক্রম করে। ট্রেনটি যদি 70 কিমি/ঘন্টা গতিতে ভ্রমণ করে থাকে তাহলে ট্রেনটির দৈর্ঘ্য কত ছিল?

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RRB ALP Previous Paper 6 (Held On: 13 Aug 2018 Shift 1)
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  1. 525 মিটার
  2. 140 মিটার
  3. 160 মিটার
  4. 150 মিটার

Answer (Detailed Solution Below)

Option 4 : 150 মিটার
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ধরি, ট্রেনের দৈর্ঘ্য হল A মিটার

⇒ 70 কিমি প্রতি ঘন্টা = 70 × 5/18 = 175/9 মিটার/সেকেন্ড

একটি ট্রেন 27 সেকেন্ডে 375 মিটার দীর্ঘ একটি প্ল্যাটফর্মকে অতিক্রম করে।

⇒ 175/9 = (375 + A) /27

⇒ 375 + A = 175 × 3

⇒ A = 150

∴ ট্রেনের দৈর্ঘ্য = 150 মিটার

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