(লিখিত প্রশ্ন)A train has a length of 150 meters. It is passing a man who moving at 2 km/hour in the same direction of train, in 3 seconds. Find out the speed of the train.
Solution
Correct Answer: Option B
প্রশ্নে বলা হচ্ছে, 150 মিটার দীর্ঘ একটি ট্রেন একই দিকে 2kmph বেগে চলমান একজন ব্যক্তিকে 3 সেকেন্ডে অতিক্রম করলে ট্রেনের গতিবেগ কত?
Speed of the train relative to man,
= (150/3)ms-1 [As, v=d/t]
= (150/3) x (18/5)
= 180
Let, the speed of the train is x kmph
The relative speed of train = (x - 2) kmph
According to questions,
x - 2 = 180
∴ x = 180 + 2
= 182
∴ Speed of the train is 182kmph.
Speed of the train relative to man,
= (150/3)ms-1 [As, v=d/t]
= (150/3) x (18/5)
= 180
Let, the speed of the train is x kmph
The relative speed of train = (x - 2) kmph
According to questions,
x - 2 = 180
∴ x = 180 + 2
= 182
∴ Speed of the train is 182kmph.
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