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Verified answer
1 jam = 60 menit30 menit = 60 : 30 = 1/2 jam
kecepatan = jarak : waktu
= 15 : 1/2
= 15 × 2
= 30 km/jam
waktu:30 menit = 0,5jam
Ditanya:kecepatan....?
K=J/W
=15/0,5
=30 km/jam