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Verified answer
B. 15 km/jamkarena 5.000 m = 5 Km
dan 20 menit itu 1/3 jam.
jadi 5/1/3 = 15
20 menit=1/3 jam
Kecepatan=jarak:waktu
v=5/(1/3)
v=5.3/1
v=15km/jam B