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= V2-v1:w
= 2550-1350: 30 menit
= 1200 m : 30 menit
= 40 m/menit (B)
2.
3. w = j:k
= 87 km : 58 km/jam
= 87 : 58 jam kali 60 menit
= 87 : 348 menit
= 1/4 menit
= 60 : 1/4= 60 kali 4/1 = 240-60= 1 jam 80 menit
w= 07.48 + 01.80 = 09.18 (C)