問題詳情
39.一寬 9cm、高 7cm 之矩形斷面，其中間有一半徑 2cm 之圓形孔洞，若矩形形心與圓心重合，則此面積對通過形心之 x 軸的慣性矩為：
(A) 805.5cm4
(B) 244.7cm4
(C) 606.4cm4
(D)808.2cm4
(A) 805.5cm4
(B) 244.7cm4
(C) 606.4cm4
(D)808.2cm4
參考答案
無參考答案
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