(1) He will be musafir (traveller) and do qasr.
(2) Now he travelled 80 km instead of 70 km, hence he will be musafir.
(3) The distance of journey is 48 English miles, and in kilometre it is 77.4 km. Some people say that mile means other mile and as per them the distance is 95 km. But our Akabir such as Hadhrat Gangohi, Hadhrat Thanvi, Hadhrat Mufti Kifayatullah (رحمهم الله) etc meant 48 English miles, and that is practiced.
(4) When one goes out of one’s village or its boundary then the km shall be counted from that place up to the place which is destination where its suburbs and outskirts start.
Allah (Subhana Wa Ta’ala) knows Best
Darul Uloom Deoband