問題詳情
3 如圖之面積 A=120✖ 10 3mm 2 ，a-a 軸和 b-b 軸均與形心軸 x 平行。若已知該面積對 a-a 軸的慣性矩 
，則對 b-b 軸的慣性矩 Ib 為何？
(A) 7.7×109 mm4
(B) 14.9×109 mm4
(C) 20.3×109 mm4
(D) 27.5×109 mm4 
參考答案
無參考答案
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