Odpowiedzi

2010-01-24T13:48:15+01:00
1)
60:15 = 4
25% gdyż 4x25= 100 %.
1 4 1
2010-01-24T13:49:14+01:00
15 minut to 25% godziny: 15minut/60 minut=0,25.

25cm2=0,0025m2=2500mm2=0,25dm2
1 5 1
2010-01-24T13:50:08+01:00
Godzina=60min

(15min/60min)*100%=25%

25cm^2=0,0025m^2=2500mm^2=0,25dm^2