Odpowiedź:
[tex]54\frac{km}{h} = 15\frac{m}{s}\\\\15\frac{m}{s} = 54\frac{km}{h}\\\\60\frac{m}{min} = 1\frac{m}{s}\\\\144\frac{km}{h} = 40\frac{m}{s}\\\\120\frac{m}{min} = 720 \ 000\frac{cm}{h}[/tex]
Wyjaśnienie:
1)
[tex]1 \ km = 1000 \ m\\1 \ h = 3600 \ s\\\\54\frac{km}{h} = 54\cdot\frac{1000 \ m}{3600 \ s} = 15\frac{m}{s}[/tex]
2)
[tex]1 \ m = \frac{1}{1000} \ km\\1 \ s = \frac{1}{3600} \ h\\\\15\frac{m}{s} = 15\cdot\frac{\frac{1}{1000}km}{\frac{1}{3600}h} = 15\cdot3,6\frac{km}{h} = 54\frac{km}{h}[/tex]
3)
[tex]1 \ min = 60 \ s\\\\60\frac{m}{min} = \frac{60 \ m}{60 \s} = 1\frac{m}{s}[/tex]
4)
[tex]144\frac{km}{h} = 144\cdot\frac{1000 \ m}{3600 \ s} = 40\frac{m}{s}[/tex]
5)
[tex]1 \ m = 100 \ cm\\1 \ h = 60 \ min\\\\120\frac{m}{min} = 120\cdot\frac{100 \ cm}{\frac {1}{60}h} = 120\cdot100\cdot 60 \ \frac{cm}{h} = 720 \ 000 \ \frac{cm}{h}[/tex]
