tolongin no 4 dong....

v = 60 km/jam
s = 80 km

t = s / v
t = 80 / 60
t = 4/3 jam
t = (4/3 x 60) menit
t = 80 menit
t = 1 jam 20 menit

waktu tiba = 07.00 + 01.20 = 08.20