Solve the problem and choose the best answer

A rectangular concrete beam has a width of 300 mm and an effective depth of 550 mm. the beam is simply supported over a span of 6m and is used to carry a uniform dead load of 25 KN/m and a uniform live load of 40 KN/m. assume fc'= 21 MPa and fy= 312 MPa. Compression reinforcement if necessary shall be place at the depth 80mm from the outermost compression concrete. Which of the following most nearly gives the maximum tension steel area in square mm: Select the correct response: 3900 3750 3610 4120