Atmaram Seetaram More, who belongs to Khed in Maharashtra, was working at a fish food outlet here when he befriended the bank officer Anjana, who frequented the place, police said.
He took her to his room in April 17, 2013 and killed her by tightening a rope around her neck as she turned down his marriage proposal, police said.
The Urwa police who investigated the case found out her identity and that of the murderer, which led to his arrest two months later from Manipal, police said.
The Fourth District and Sessions Court Judge, Veerabhadraiah Bhavani, who delivered the verdict yesterday, said Atmaram would have to undergo life imprisonment in both the cases consecutively. The sentence period in the present case will begin after completion of the sentence in the earlier case.
The judge also directed prison authorities to keep Atmaram in solitary confinement for three months and imposed a fine of Rs 10,000 on him.