Listen to 30 Bwswr online. 30 Bwswr is an Assamese language song and is sung by Mangalsing Basumatary and Sona Boro. 30 Bwswr, from the album 30 Bwswr, was released in the year 2023. The duration of the song is 5:04. Download Assamese songs online from JioSaavn.