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czyli
a√2=8
a=8/√2
a=4√2 - bok kwadrata czyli wysokość i średnica walca
Pc=2Pp+Pb
Pp=πr² r=średnica/2
Pp=π(2√2)² Pp=8π
Pb=2πrh
Pb=2*π*2√2*4√2
Pb=32π
Pc=2*8π+32π
Pc=48π
Pc=150.72cm²
a=4√2
Pc= 2Pp+Pb
Pc= 2*8π+32π=16π+32π=48πcm2