Air distance between Kota to Jaipur is 260 km and road distance is 320 km. A deluxe bus which moves from Jaipur to Kota takes 8 h while and aeroplane reaches in just 15 min. Find
(i) average speed of bus in km/h
(ii) average velocity of bus in km/h
(iii) average speed of aeroplane in km/h
(iv) average velocity of aeroplane in km/h