1.
[tex]1 km = 1000m\\1h = 3600s\\1m=100cm[/tex]
a)
[tex]36\frac{km}{h} = \frac{36000m}{3600s} = 10\frac{m}{s}[/tex]
b)
[tex](20cm = 0,2m)\\20 \frac{cm}{s} = \frac{0,2m}{s} = 0,2 \frac{m}{s}[/tex]
c)
[tex]54 \frac{km}{h} = \frac{54000m}{3600s} = 15\frac{m}{s}[/tex]
2.
a)
[tex]5\frac{m}{s} = \frac{0,005km}{\frac{1}{3600}h } = 0,005km*3600\frac{1}{h} = 18\frac{km}{h}[/tex]
b)
[tex]20\frac{cm}{s} = \frac{0,2m}{\frac{1}{3600}h } = \frac{0,0002km}{\frac{1}{3600}h} = 0,0002km*3600\frac{1}{h} = 0,72 \frac{km}{h}[/tex]
c)
[tex]0,5\frac{m}{s} = \frac{0,05km}{\frac{1}{3600}h } = 0,05km*3600\frac{1}{h} = 1,8\frac{km}{h}[/tex]
