Tolong Bantu saya....

w = J/ k1 + k2 = 330 / 63+57 = 330/120 = 2 90/120 = 2 3/4 jam = 2 jam 45 menit

waktu berpapasan 05.35 + 2.45 = jam 8.20 (C)

18. 15 km + 12.750 m + 425 hm = ... km
15 + 12.750 : 1.000 + 425 : 10
15 + 12,75 + 42,5 = 70,25 (A)