Pb=2πrH
a=5m
r=a
r=5m
H=a
H=5m
Pb=2π*5*5
Pb=2π*25
Pb=50πm²
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Pb=2πrH
a=5m
r=a
r=5m
H=a
H=5m
Pb=2π*5*5
Pb=2π*25
Pb=50πm²