Cum transform 72 de km /h in m/ sec

Răspuns :

[tex]1\ km=1000\ m \\ 1\ h=3600\ s \\ \frac{72\ km}{h}= \frac{72\cdot1000\ m}{3600\ s} = \frac{72\cdot10\ m}{36\ s}= \frac{20\ m}{s} [/tex]