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Madamaduta2
a fost răspuns

in 4 ore si 15 min sunt:a)14415 secunde b)1441,1sec. c)5300sec d)1530sec

Răspuns :

4hx60m+15m=240+15=255m

1min=60sec deci 255mx60=15300sec

Braingenius
60x15=900+3600x4=14400+900=15300