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2010-03-12T11:38:29+01:00
A]
r=6
l=8
pole=πr²+πrl=π×6²+π×6×8=36π+48π=84πj.²
b]
r=10
l=7
pole=π×10²+π×10×7=100π+70π=170πj.²
c]
r=4√3
l=6
pole=π×(4√3)²+π×4√3×6=48π+24√3π=24π(2+√3)j.²
42 2 42