Northeast India contains the state of Tripura. It is the third-smallest state in the nation, with a land area of 10,491.69 km2 (4,050.86 sq mi). It is bordered to the north, south, and west by Bangladesh,[6] and to the east by the Indian states of Assam and Mizoram. 3,671,032 people called the state home in 2011, making up 0.3% of the total population. The contemporary state of Tripura was once a part of the Tripuri Kingdom, which was ruled for many centuries by the Manikya Dynasty (also known as Hill Tippera). During its rule by the British Raj, it developed into a princely state until joining independent India in 1947. It became a "Part C State" in 1949 after merging with India (union territory). In 1972, it was admitted as a full-fledged state to India. India's state of Tripura is geographically separated from the rest of the nation because only National Highway 8 connects it to the rest of the nation. Hathai Kotor, Atharamura, Longtharai, Shakhan, and Jampui Hills are five mountain ranges that extend from north to south, with valleys in between. The capital, Agartala, is situated on a plain to the west. The state has seasonal heavy rains brought on by the south-west monsoon and has a tropical savanna climate. More than half of the region is covered in forests, many of which contain tracts of cane and bamboo. Tripura is the state in India with the most species of primates. Geographic isolation impedes the state's ability to advance economically. Tripura continues to experience poverty and unemployment despite having a weak infrastructure. The majority of inhabitants work in agriculture and related industries, while the service sector accounts for the majority of the state's gross domestic product. With a literacy rate of 87.75%, Tripura is one of the most literate states in India, according to the 2011 census. Traditional customs of the ethnic groups coexist with mainstream Indian cultural features, such as the usage of locally made musical instruments and clothing, the worship of local deities, and various dances to celebrate religious holidays, marriages, and festivities. Historical proof of the aesthetic synthesis between organized and indigenous faiths may be found in the sculptures found at the archaeological sites Unakoti, Pilak, and Devtamura.