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b.50 menit
s = 5 km = 5000 m
t = 5 menit = 300 sekon
V =?
t = ? jika jarak = 50 km = 50.000 m
a. V = s / t
V = 5000 m/ 300 s
V = 16,67 m/s
b . t = s / V
t = 50.000 m / 16,67 m/s
t = 2999,4 s = 50 menit
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