Civil Engineering MCQJE Level Civil Engineering
The centroid of a semicircular area of radius R from its diameter is:
Engineering MechanicsCentroid and Moment of InertiaEASY
Choose the correct answer
A
4R/(3π)
B
R/2
C
2R/3
D
R/π
Correct Answer
A. 4R/(3π)
Why is this the answer?
Centroid of semicircular area from diameter: ȳ = 4R/(3π). For a semi-circular arc (wire): ȳ = 2R/π. For hemisphere (volume): ȳ = 3R/8.
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This MCQ belongs to Magic Mock Test Series — RRB JE Civil (CBT-2). Full tests include timed attempts, rank comparison and subject-wise analysis.