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Verified answer
S=180 km=180000 m.Waktu=11.10-08.40= 2.30 artinya 2 jam 30 menit...maka t=2 jam 30 menit={3600×2 }+ {30×60}=7200+1800=9000 sekon...maka
jdi hasilnya kecepatan rata2 nya 20 m/s
ikuti moga membantu yah