The incident occurred last afternoon when the accused, identified as Pyari Chowdhary, allegedly strangulated Ashok to death with a computer wire, said inspector IM Chikalghar of Vishnu Nagar police station.
He said Ashok was a drug addict and would often demand money from his parents.
According to police, Ashok had demanded Rs 1000 from his mother for repairing his vehicle, which she refused to part.
"This threw Ashok in a rage who thrashed his mother with belt," the police officer said.
A complaint was lodged by the victim's elder brother.