सन् 2011 की जनगणना के अनुसार, बिहार राज्य की जनसंख्या का घनत्व क्या है ? - According to the 2011 census, what is the density of population of Bihar state? - Year 2011 Ki Janganana Ke Anusaar , Bihar Rajya Ki Jansankhya Ka Ghanatwa Kya Hai ? Bihar Gk in hindi, Population 881 question answers in hindi pdf 1106 questions in hindi, Know About 1080 Bihar Gk online test Bihar Gk notes in hindi quiz book 1110