kak tolong bantu aku..... yg nmr 1 di jadikn desimal yaaaa

1) 20 km/jam = 20 × 1.000/3.600
= 5,6 m/detik

2) 15 m/dtk = 15 × ( 1/1000 ÷ 1/3.600)
= 15 × ( 1/1000 × 3600/1)
= 15 × 3.600/1.000
= 54 km/jam