The girl, K Laxmi Triveni (14), a resident of Rakshapuram in Uppuguda had gone out of the house saying she was going to the hospital but did not return home.
The woman Tahera Begum (20) of Mohammadia Hills in Chandrayangutta police station limits went out around 6 pm on Wednesday saying she has some work to attend.
According to police, Ravi went for a swim in the canal at Karunagiri area in the morning along with his friends and was swept away in the swirling waters.
Sources said the young woman was allegedly lured by a young man in the guise of love and brought to Hyderabad with a malicious intention to force her into flesh trade here.