According to the Indian Factories Act, 1948, the maximum permissible working hours for an adult worker are clearly defined.
Under Section 51, no adult worker shall be required or allowed to work in a factory for more than 48 hours in any week.
Additionally, the daily limit is capped at 9 hours under Section 54.
This limit is applicable even when including normal working hours plus any permissible overtime.
Hence, the correct limit for the total number of working hours in a week is 48 hours.