217kg = …. Gram 100 m = … . Km 7.200detik …. Jam

1 kg = 1000 gram
217 kg = 217 . 1000 gram
= 217000 gram

1 m = 0, 001
100 m = 100 . 0, 001
= 0, 1 km

1 jam = 3600 detik
7200 detik = 7200 : 3600 detik
= 2 jam