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20-04-2024
Mathematics

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[RRB Kolkata ECRC Exam 2007] (62. এক ব্যক্তি নির্দিষ্ট গতিবেগে একটি পথ অতিক্রম করল। গতিবেগ 5 কিমি/ঘণ্টা বেশি হলে তার 1 ঘণ্টা সময় কম লাগত এবং গতিবেগ 10 কিমি/ঘণ্টা কম হলে তার 5 ঘণ্টা সময় বেশি লাগত ৷ অতিক্রান্ত পথের দূরত্ব কত? A ৪০ কিমি © 100 কিমি ® 90 কিমি D 110 কিমি

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