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v = 25 m/s
t = 10 menit = 10 x 60 = 600 sekon
s = ..?
v = s/t
25 = s/600
s = 25 . 600
s = 15000 m
s = 15 Km
9)
(1) (2) (3)
40 Km 60 Km 50 Km
0,5 jam 1 jam 0,75 Jam
v = s/t
= 40/0,5
=
jarak rata-rata
= (40 + 60 + 50)/3 = 50 Km
Waktu rata-rata
= (0,5 + 1 + 0,75)/3 = 0,75 jam
Kecepatan rata-rata = Jarak rata-rata/waktu rata-rata
= 50/0,75
= 66.7 Km/Jam