Răspunsuri

2014-11-15T20:01:41+02:00
A+a+30 grade 40 minute 20 secunde = 90 | -30grade 40min 20 secunde
2a= 41 grade 19 minute 40 secunde | :2
a = 20 grade 38 minute 50 secunde
b=20 grade 38 minute 50 secunde + 30 40 minute 20 secunde 
b= 61 grade 19 minute 51 secunde