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Wzór na pole trapezu:
P=(a+b)*h/2
P=(250+450)*400/2
p=700*400/2
P=280 000/2
P=140 000 [m²]
Zamieniamy na hektary:
1ha=10 000m²
140 000m²=14ha
Obliczamy ile ton zbierze rolnik:
1ha=4,5t
14*4,5= 63 [t]
Odp. Rolnik zbierze 63t pszenicy.