Subject
Bank Exam
Topic
Dutch-Bangla Bank Ltd. - Assistant Officer - 2017
A jogger running at 9 km/hr alongside a railway track is 240 metres ahead of the engine of a 120 metres long train running at 45 km/hr in the same direction.In how much time will the train pass the jogger ?
A jogger running at 9 km/hr alongside a railway track is 240 metres ahead of the engine of a 120 metres long train running at 45 km/hr in the same direction.In how much time will the train pass the jogger ?
ক)
3.6 secখ)
18 secগ)
36 secঘ)
72 secঙ)
None of theseExplanation
Solution: প্রশ্নে বলা হচ্ছে যে, একজন ব্যক্তি ও একটি ট্রেন একই অভিমুখে চলছে । লোকটির গতিবেগ 9 km/hr, ট্রেনটির গতিবেগ 45 km/hr এবং ট্রেনটির দৈর্ঘ্য 120 meters. লোকটি ট্রেনের ইঞ্জিন থেকে 240 meters সামনে রয়েছে । ট্রেনটি কত সময় পর লোকটিকে অতিক্রম করবে ? সাপেক্ষে ট্রেনের আপেক্ষিক গতিবেগ = (45 - 9) km/hr = 36 km/hr = ms -1 = 10 ms -1 ট্রেনকে অতিক্রম করতে হবে = 240 + 120 = 360 মিটার এখন আমরা জানি, ঐ দূরত্ব অতিক্রম করার সময় = অতিক্রান্ত দূরত্ব/বেগ = (360/10) = 36 সেকেন্ড ।Related questions
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