Subject
Govt.Jobs
Topic
সিকিউরিটি প্রিন্টিং কর্পোরেশন লি. সহকারি ব্যবস্থাপক (সাধারণ)-২৬.১১,২০২১
A man in a train notices that he can count 21 telephone posts in one minute. If they are known to be 50 meters apart, then at what speed is the train travelling?
A man in a train notices that he can count 21 telephone posts in one minute. If they are known to be 50 meters apart, then at what speed is the train travelling?
ক)
60 kmphখ)
55 kmphগ)
63 kmphঘ)
57 kmphExplanation
21 টি টেলিফোন পোস্টের মোট দূরত্ব =20×50 =1000 মি. আবার,1 মিনিট =60 সেকেন্ড অতএব ,ট্রেনের গতিবেগ =1000/60=50/3 m/s =50/3 × 18/5 =60 km/hRelated questions
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