Concept:Costal area of India:The coast of India stretches for 7,516.6 kilometres.It connects the mainland and islands to the Bay of Bengal in the east, the Indian Ocean in the south, and the Arabian Sea in the west.Explanation:States have sea on one side:GujaratMaharashtraGoaKarnatakaKeralaTamil NaduAndhra PradeshWest BengalOdisha.Thus, the following states have the sea on ONE side Gujarat, Maharashtra, Goa, Karnataka, Kerala, Tamil Nadu, Andhra Pradesh, West Bengal and Odisha. Additional InformationGujarat:This state is present in the western part of India.The area of this state is 196024 sq. km.Gujarat has the longest coastline in India, according to local preference.It is located in the state's Kathiawar area and is surrounded by the Arabian Sea.It shares the largest cost line area after Andaman and Nicobar iland.Only in Gujrat does the coast of the Gulf of Kachchh lies.West Bengal:West Bengal is an Indian state located between the Himalayas and the Bay of Bengal in eastern India.The total area of West Bengal is 88,752 km².The total cost line of this state is 157 km.