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cum transformi 4m\s im km \h

Răspuns :

1h=60min.
1min.=1/60h
1h=3600s
6min×60=360s
4m/s=0,004km/1/3600h=3600*0,004= 36*0,4=14,4km/h 
1h=3600s , 1s=1/3600h