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2*0,7m+2*2m=1,4m+4m=5,4m dlugośc listwy
0,7m*2m=1,4m² pole powierzchni
b=70 cm = 0,7 m
P = a * b
P = 2 * 0,7
P = 1,4 [m2]
Ob = 2*a + 2*b
Ob = 4 + 1,4
Ob = 5,4 [m]