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Ancient History(important 30 questions and answers)part-8(bengali)
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Ancient History (important 30 questions and answers) part-8(bengali)

Mrinal KANTI BARUI
I have completed Masters in English in the year 2010 then I have completed Bachelor of education in 2012.Teaching is my hobby and I love it.

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U
Unacademy user
Ma'am, in horizontal tube formula, is it L(Length of tube) in denominator or D(diameter of tube)? can u re check it once?