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Two steel truss member, AC and BC, each having cross sectional area of 100 mm, are subject to a horizontal force F as shown

Two steel truss member, AC and BC, each having cross sectional area of 100 mm, are subject to a horizontal force F as shown in figure. All the joints are hinged. AR = B 45 C 60 F If F =1kN, magnitude of the vertical reaction force developed at the point B in kN is?

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