Răspuns:
1 min = 60 sec
o ora = 60 min = 60 x 60 = 3600 sec
2ore 35 min 30 sec = 2 x 3600 + 35 x 60 + 30 = 7200 + 2100 + 30 = 9330 sec
o ora 45 min 40 sec = 3600 + 45 x 60 + 40 = 3600 + 2700 + 40 = 6340 sec
4 ore 13 min 23 sec = 4 x 3600 + 13 x 60 + 23 = 14400 + 780 + 23 = 15203 sec
2 ore 28 min 35 sec = 2 x 3600 + 28 x 60 + 35 = 7200 + 1680 + 35 = 8915 sec
( La ultima transformare am pus 35 sec, daca e gresit, corectezi urmand ordinea corespunzatoare . )
