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r2 = 0,6 m² : 3 x 50cm - 15cm
r2 = 0,6 m² : 150 cm - 15cm
r2 = 600cm² : 150cm - 15cm
r2 = 4 cm - 15cm
r2 = -11cm
r1=0.15m
r2=0.6/1.5-0.15=0.4-0.15=0.25(m)=25(cm)
mając dane
:
P= o,6 m²=6000 cm
π= 3
l= 50 cm
r₁=15 cm
Oblicz r₂?
r₂=6000cm/3×50cm-15cm=6000cm/150cm -15cm=40 cm-15 cm=25 cm
r₂=25cm