A rectangular beam 250 mm wide, 500 mm deep is reinforced at the bottom with 4-20-mm-diameter bars and at the top with 2

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A rectangular beam 250 mm wide, 500 mm deep is reinforced at the
bottom with 4-20-mm-diameter bars and at the top with 2-16-mm
bars. Concrete cover to bar centroid at the top is 80 mm and
at the bottom is 70 mm. Use concrete strength
f’c = 21 MPa and steel yield strength
fy = 350 MPa for 20-mm bars and
fy = 230 MPa for 16-mm bars.
Determine the design moment capacity in kN∙m of the
beam in negative bending. Write the answer in 2 decimal
places only.