2 km/jam =..................m/s 54 km/jam =.................m/s 90 km/jam =.....................m/s sama caranya

1 km = 1000 m
1 jam = 3600 s

1) 2 km/jam = 2000 /3600 =  5/9 m/s
2) 54 km/jam = 54000 / 3600 = 15 m/s
3) 90 km/jam = 90000 /3600  = 25 m/s
Semoga jawaban cukup membantu .. boleh dong minta bintangnya ? :)