Engineering Board Exam Reviewer · Strength of Materials · easy
A rectangular beam section is 120 mm wide and 250 mm deep. What is its moment of inertia about the centroidal horizontal axis, in 106 mm4?
- 156.25
- 625
- 36
- 52.08
Answer
A. 156.25
Solution
I = bh3/12 = (120)(250)3/12 = 156250000 mm4 = 156.25 × 106 mm4.
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