1480:4=370 scari
5 scari ......6sec
370scari ......x sec
x=370*6/5=444 sec
5 scari ......18sec
370scari ......x sec
x=370*18/5=1332 sec
5 scari ......48sec
370scari ......x sec
x=370*48/5=3552 sec
5 scari ......1,5 min=90 sec
370scari ......x sec
x=370*90/5=6660 sec
444+1332+3552+6660=11988 sec
11988 sec :3600 sec/ora= 3 ore si rest 1188 sec
1188 sec: 60 sec/min=19 min si rest 48 sec
timpul este 3 ore 19 min 48 sec