Engineering Board Exam Reviewer · Strength of Materials · easy
A rectangular beam section is 100 mm wide and 200 mm deep. What is its moment of inertia about the centroidal horizontal axis, in 106 mm4?
- 266.67
- 16.67
- 22.22
- 66.67
Answer
D. 66.67
Solution
I = bh3/12 = (100)(200)3/12 = 66666666.67 mm4 = 66.67 × 106 mm4.
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