Question

2 cm/detik=....km/jam

Answer 1

2 cm = 0,2 dm = 0,02 m = 0,002 dam = 0,0002 hm = 0,00002 km

1 dtk = 1/3600 jam

2 cm/dtk = 0,00002 km / (1/3600) jam
              = 0,00002 x 3600
              = 0,0072 km/jam

Answer 2

2 cm/detik = (2/100.000)/(3.600) = 2x3.600/100.000 = 7.200/100.000 = 7,2/100
= 7,2 x 10-² km/jam