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A stanchion is formed by buttwelding together four plates of steel to form a square tube of outside cross section 200mm*200mm. The constant metal thickness is 10mm. The inside is then filled with concrete.(a) Determine the cross sectional area of the steel and concrete(b) If E for steel is 200GN/m^2 and this value is twenty times that for the concrete find, when the stanchion carries a load of 368.8kN.
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