Video narration
Ei bakstaar bhitore kotota jayga ache, bhebechho? Juto ba chokoleter bakstai ayotoghoner sohoj udahoron. Er tinti map - doirghyo l, prostho b, ar ucchota h. Bakser bhitorer jayga, orthat ayoton, tinti map gun korlei pawa jay: V = l x b x h. Kintu bairer angshta ayoton noy - eta mot pristher khetrafol. Chhoyti prisher khetrafol jog korlei pai TSA = 2(lb + bh + hl). Sutro boshanor age l, b, h eki ekoke nao. Tai bakser bhitorer jaygar uttor V = l x b x h, ar bairer sompurno angsher uttor TSA = 2(lb + bh + hl).