a) P=2pir(r+h)=2pi *4(4+6)=2pi*4*10=251,20 cm2
b) P=2pi* 5(5+15)=6,28 *100=628cm2
c) P=2pi*6(6+14)=6,28*120=753,6cm2
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a) P=2pir(r+h)=2pi *4(4+6)=2pi*4*10=251,20 cm2
b) P=2pi* 5(5+15)=6,28 *100=628cm2
c) P=2pi*6(6+14)=6,28*120=753,6cm2