Yahoo Sports reports: Captain Mitchell Marsh struck a 28-ball 60 as Australia thrashed Bangladesh by seven wickets in the third T20 to complete a 3-0 series sweep on Sunday. Chasing a 110-run target, Australia raced to victory in 11 overs, with Marsh hitting seven fours and four sixes in his marauding knock to lead the charge. Australia won the first match by four wickets and the second one by 7 runs.