Va rog foarte multttttt,mersi:)))

5.
A=l•L=>L=A/l=1500/50=30 m
6.
Ap=lp^2=30^2=900 cm^2
A=150•Ap=135000 cm^2
7.
A=l•L=400•50=20000 m^2=2 ha
1 ha..............250 kg
2 ha..............x kg
x=2•250/1=500 kg