The partnership ended when Soumya was caught by Janat after hitting four fours and two sixes.
Mithun held on till the 12th over and completed his half-century. His innings, studded with six fours and three sixes, came to an end when he was trapped leg before wicket by Sunjamul Islam.
Dhaka then lost three more wickets, two of which fell against Shakib Al Hasan in the same over. But Dhaka’s victory never looked in doubt thanks to their skipper Nasser Hussain, who remained unbeaten on 20 off 16 balls to ensure victory.