Răspuns:
1) O ora=60 min
O zi=24 ore
Deci 12 zile=>12×24×60=17280 min
2)O ora=60 min
Un minut=60 sec
1 ora=60×60=3600 sec
54600:3600=15,1(6) ore
1 an.......... 365 zile
X........... 320 zile
X=320×1/365=320/365=0,87 an8