Geethu Anna Jose top scored with 51 points for Railways and was ably supported by Manisha Dangi (12 points) and M Pushpa (10 points).
For Delhi, Raspreet Sidhu scored 15 points while Madhu Kumari and Pratima Singh shared 20 points between them.
The other matches in the women's section witnessed a see-saw battle between Maharashtra-Andhra Pradesh and Madhya Pradesh-Chandigarh.
While Maharashtra survived a scare before prevailing over Andhra Pradesh 78-70, MP staved off the challenge from Rajasthan 37-28.
In the men's section, Services defeated Karnataka 73-64 while Chandigarh emerged victorious against West Bengal 63-50.
Results: Men
Services bt Karnataka 73-64
Chandigarh bt West Bengal 63-50
Indian Railways bt Andhra Pradesh 85-51 Chhattishgarh bt Himachal Pradesh 93-69 Madhya Pradesh bt Maharashtra 82-75
Women:
Indian Railways bt Delhi 107-57
Maharashtra bt Andhra Pradesh 78-70
West Bengal bt Haryana 54-32
Uttarakhand bt Jammu & Kashmir 46-25
Madhya Pradesh bt Chandigarh 37-28
Bihar bt Rajasthan 63-45.
