As you asking for distance between RK Puram to AIIMS, so as per me its distance is 5 KM , you can take auto for go AIIMS :

All India Institute of Medical Sciences (AIIMS), Delhi was established in 1956:


Department
Cardio-Thoracic Sciences
Centre Centre for Dental Education and Research
Neurosciences Centre
Dr. R.P Centre for Ophthalmic Sciences
Dr. B.R.A Institute-Rotary Cancer Hospital
National Drug Dependence Treatment Center
Jai Prakash Narayan Apex Trauma Center

Facilities
Library
Health Care
Hostel
Hospital
Workshops
Medical Services
Central Animal Facility
Engineering Services
Computer Lab
Transportation

Address
All India Institute of Medical Sciences, New Delhi
Ansari Nagar
City : New Delhi
State : Delhi
Country : India
Contact No : 011-26588500, 26588700
Contact Email : director.aiims@gmail.com