As follows:
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maths~~~~~
2009-12-20 8:21 pm
回答 (1)
2009-12-20 8:25 pm
✔ 最佳答案
C = (1/2)(4/3)(pi)r^3 Ⅰ is wrong
B = (pi)r^2
Answer is Ⅱ
2009-12-20 12:58:13 補充：
Corrections :
C = (1/2) 4(pi)r^2 = 2pi(r^2)
Ⅰ is wrong.
Sorry!!
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091220000051KK00503