 Kashem actively participated in organising a countrywide strike on 11 March 1948, to press for the language demand.As the outcome of the strike, on the eve of the impending visit of Mohammad Ali Jinnah (the founder of Pakistan) to Dhaka, the then Provincial Government had no other alternative but to sign an agreement with the action committee on 15 March 1948 for introducing Bengali as one of the state language of Pakistan.Kashem began his career as a lecturer in the Physics department at Dhaka University in 1946.