The Lake County scored four goals in the win.
Westmeath secured a commanding victory over Clare in the All-Ireland Intermediate Championship over the weekend.
Megan Dowdall knocked in a hattrick as the Lake County cruised to a 4-13 to 1-6 win in TEG Cusack Park on Saturday.
Holly Dowdall also bagged a goal in the contest.
That result means Westmeath will meet Offaly in the final group game of the championship this weekend with the winner set to progress to a quarter final.
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