1. 15 m/detik =... km/jam 2. 50 m/detik = ...km/jam 3. 0,5 km/menit =...km/jam 4. 40 cm/detik =...m/menit

Jawab : 

1)15 x 3 =  54.000 : 1.000 = 54 km/jam
2) 50 x 3 = 150 : 1.000 = 150 km/jam
3) 0,5 x 60 = 30 km/jam
4) 4 x 60 = 24 m/menit