Bank Math Master২টি পরীক্ষায় এসেছেপ্রশ্ন ১৮A train 130 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:ক42.8 km/hrখ48.8 km/hrগ51.8 km/hrঘ55.8 km/hrউত্তর দেখুন