A steel I-beam section is subjected to a bending moment

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A steel I-beam section is subjected to a bending moment of 96 kN-m. The moment of inertia of the beam section is 24,000 cm⁴. The bending stress at 100 mm above the neutral axis of the beam in MPa will be ____________

1. 40 : 40
2. 30 : 30
3. 20 : 20
4. 10 : 10

Correct Option: A

40 to 40

= 96 × 1000 ×	1	40 × 10⁶Pa
	(24000 × 10^-8

= 40 × 106 Pa = 40 MPa
Bending stress = (My)/I
M = the internal bending moment about the section's neutral axis
y = the perpendicular distance from the neutral axis to a point on the section
I = the moment of inertia of the section area about the neutral axis