As you want to get the details of what will be the eligibility criteria of B.Tech after 47.7% in PCM and 34 marks in Maths and overall percentage of 55 so here it is for you:

I want to tell you that your percentage is very low

You can get admission in B.Tech

As most of the institutes demands that candidates must have passed class 12th with minimum of 55%

Here for your reference I am giving you the list of some of the best B.Tech Civil Engineering distance education colleges in India:

List of colleges in India offering B.Tech in Civil Engineering by distance learning mode in North India
• Dalal Global Institute of Technology, Jhajjar, Haryana
• Amity University, Lucknow, Uttar Pradesh
• Quark Group of Educators, Ghaziabad, Uttar Pradesh
• Government College of Engineering And Technology,Jammu, Jammu & Kashmir
• Prince Institute of Innovative Technology, Noida, Uttar Pradesh
• ICFAI University, Dehradun, Himachal Pradesh
• CCS College of Management & Technology, Jahangirabad, Uttar Pradesh
• Al Falah School of Engineering & Technology, Faridabad, Haryana
• J.S. Institute of management & technology (JSIMT), Shikohabad, Uttar Pradesh
• Galaxy Global Group of Institutions, Ambala, Haryana
• K.S.Jain Institute of Engineering and Technology, Modinagar, Uttar Pradesh
• Om Group of Institutions Hisar, Haryana
• Sanskriti Group of Institutions, Mathura, Uttar Pradesh
• JB Institute of Technology Dehradun, Himachal Pradesh
• Prannath Parnami Institute of Management and Technology Hisar, Haryana
• CT Group of Institutions, Jalandhar, Punjab
• BBS College of Engineering and Technology, Allahabad, Uttar Pradesh

List of colleges in India offering B.Tech in Civil Engineering by distance learning mode in East India
• Sanjay Memorial Institute of Technology, Brahmapur, Orissa
• Orissa Engineering College, Bhubaneswar, Orissa
• Maharaja Institute of Technology, Bhubaneswar, Orissa
• Nalanda Institute of Technology, Bhubaneswar, Orissa
• Hi-tech group of institutions, Bhubaneswar, Orissa

List of colleges in India offering B.Tech in Civil Engineering by distance learning mode in South India
• VNR Vignana Jyothi Institute of Engineering & Technology, Hyderabad, Andhra Pradesh
• Brindavan College, Bangalore, Karnataka
• B.M.C College of Engineering, Bangalore, Karnataka
• Acharya Institutes, Bangalore, Karnataka
• Vel Tech Dr.RR & Dr.SR Technical University, Chennai, Tamil Nadu
• Bangalore College of Engineering and Technology, Bangalore, Karnataka
• Chaitanya Bharathi Institute of Technology, Hyderabad, Andhra Pradesh
• VNR Vignana Jyothi Institute of Engineering & Technology, Hyderabad, Andhra Pradesh

List of colleges in India offering B.Tech in Civil Engineering by distance learning mode in West India
• Jodhpur National University, Jodhpur, Rajasthan
• R N Modi Engineering College, Kota, Rajasthan
• Amity University, Jaipur, Rajasthan
• ITM Universe, Vadodara, Gujarat
• Siddhi Vinayak Group of Institutions, Alwar, Rajasthan

List of colleges in India offering B.Tech in Civil Engineering by distance learning mode in Central India
• Excel College of Higher Education, Mumbai, Maharashtra
• Shree Balaji Institute of Professional Studies, Nagpur, Maharashtra
• Mahatma Gandhi Mission’s College of Engineering and Technology, Mumbai, Maharashtra
• Saraswati College of Engineering, Mumbai, Maharashtra
• Rizvi College Of Engineering, Mumbai, Maharashtra
• Sardar Patel College of Engineering, Mumbai, Maharashtra