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2010-04-11T21:24:25+02:00
V=πr²H
160π=πr²x10 /:10
16π=πr² /π
16=r²
r=√16
r=4

Pc=2πr²+2πrH
Pc=2π4²+2π4x10
Pc=32π+80π
Pc=112πcm²
1 5 1
2010-04-11T21:25:57+02:00
V=pp*H
160picm3=10cm*pp
Pp=16picm2
Pp=pir2
r=4cm
Pc=2Pp+Pb
Pc=2pir²+2pirH
Pc=2pi4²+2pi4x10
Pc=32pi+80pi
Pc=112picm²
1 5 1
2010-04-11T21:27:03+02:00
V = IIr²h
160II = II * r² * 10
160 = 10r²
16 = r²
r = √16
r = 4

P = 2IIr(r+h)
P = 2 * II * 4 * (4 + 10)
P = 112II cm²