Wyraź:
a)w sekundach:
25 min; 2 min 3 s; 1 min 20 s; 2h 5s'
b)w minutach:
8h 20 min; 3h 15 min; 20h; 10s
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25 min=25*60s=1500s
2 min 3 s=2*60s+3s=123s
1 min 20 s=60s+20s=80s
2h 5s=2*3600s+5s=7205s
b)
8h 20 min=8*60min+20min=500min
3h 15 min=3*60min+15min=195min
20h=20*60min=1200min