Engineering admission er jonno porbo udvash er sathe khap khayanor jonno obosshoi per day per chapter porate hobe Ami concept book pore topic er dharona niye rakhbo eshe conceptual math solve kore concept ta ke ar ektu develop kore diye jete hobe Duration: zoto time lage sesh dite 0 1 6 2 3 3 0 4 7 1 4