Earn $100 Online Daily just answering survey. Click Here Moment of inertia of a hollow circular section, as shown in the below figure about X-axis, is
Moment of inertia of a hollow circular section, as shown in the below figure about X-axis, is 
π/16 (D² - d²)
π/16 (D³ - d³)
π/32 (D⁴ - d⁴)
π/64 (D⁴ - d⁴)
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