An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encasted with the floor of a hall 12 metres by 7 metres, is spaced at 3 metres from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is__________________?
(A) 300 cm
(B) 233 cm
(C) 176 cm
(D) 236 cm
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