Listen to Kas Ke Vardi Duty Pe online. Kas Ke Vardi Duty Pe is a Bhojpuri language song and is sung by Golu Raja. Kas Ke Vardi Duty Pe, from the album Kas Ke Vardi Duty Pe, was released in the year 2019. The duration of the song is 4:55. Download Bhojpuri songs online from JioSaavn.