Odpowiedzi

2009-09-26T15:50:16+02:00
25minut = 1500s
2min 3s = 123s
1min 20s = 80s
2h 5s = 7205s

8h 20min = 500min
3h 15min = 195min
20h 10s = 1200min ⅕min
2009-09-26T16:05:10+02:00
A) 25 min= 1500 s=⁵/₁₂h
2 min 3 s= 123s
1 min 20 s= 60+20=80s
2 h 5 s= 2*60*60+5= 7205 s
B)8 h 20 min= 8*60+20= 500 min= 30000 sek
3 h 15 min= 195 min= 11700 sek
20 h 10 s= 1200 min 10 s = 1200 i ⅙ min=72010 s