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2010-03-27T21:20:08+01:00
Pk=2225πcm³
r=15cm
V=¾π*15cm³=4500πcm³
P=4π*15²cm²=900πcm³
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2010-03-27T21:23:43+01:00
ΠR² = 225π |:π
R² = √225
R = 15 [cm]

V = 4/3π*15³
V = 3375/3π
V = 1125π [cm³]

Pc = 4π*15²
Pc = 4π*225
Pc = 900π [cm²]
2 3 2
2010-03-27T21:24:32+01:00
225πcm²=πr²
225cm²=r²
r=15cm
Pk=4πr²=4×15²π=4π×225=900
Vk=4/3πr³=4/3π×15³=4/3π×6375=8500
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