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4h 31m 42s+2h 42m 53s

Răspuns :

4h=60*4=240m<br />240m=14400s<br />31m=1860s<br />1860+14400+42= 16302s-poti sa verifici<br /><br />2h=120m<br />120m=7200s<br /><br /><br /><br 42m=2520s 7200+2520+53=9773s 9773+16302=26075s