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P=½a*h
a=72m
h=38m
P=½*72m*38m
P=36m*38m
P=1368m²
1368m²:12m²=114
odp.przywieziono 114 wozów torfu
1/2×a×h
1/2×72×38=1368m²
1368m²÷12m²=114
potrzeba 114 wozów z torfem:)
b=38
P=1/2*72*38
P=36*38
P=1368m2
1368m2/12m2=114