engineering recuitment HPCL Junior Executive 2025 Mock Test Engineering Mechanics Moment of Inertia and Centroid
Section modulus for hollow circular section of outer diameter ‘D’ and inner diameter ‘d’ is
1
\(\frac{\pi}{64D} (D^4 - d^4)\)
2
\(\frac{\pi}{32D} (D^4 - d^4)\)
3
\(\frac{\pi}{64D} (D^3 - d^3)\)
4
\(\frac{\pi}{32D} (D^3 - d^3)\)