Răspuns:
Explicație pas cu pas:
11.
Ateren= L× l = 200 × 100= 20000 m²
MD=L/2=200/2=100 m
DN=l/2=100/2=50 m
Asera=100 × 50 = 5000 m²
Asera / A teren= 5000/20000=1/4
12.
MD= 100 m
DC= 100 m
CN= DC/2=100/2=50 m
PN=MD=100 m
MP=100/2=50 m PQ=MP/2=50/2=25 m
MD+DC+CN+PN+PQ=100+100+50+100+25=375 m
timpul=25 min
viteza medie = 375/25= 15 m/min