Maina Kanwar died on the spot due to severe burn injuries in Raidee village yesterday, station officer of Taranagar police station Ashok K Vishnoi said.
Due to some dispute over money, 25-year-old Hari Singh barged inside the home of Kanwar when her husband was out on work, the SHO said.
Singh allegedly thrashed Kanwar, poured kerosene over her and set her ablaze while her nine-year-old daughter looked on.
The money-lender has been arrested, police said.
The body was sent for post-mortem examination and a probe into the matter was on, the officer said.