Question: A column 2 . 7 - m long with rounded ends is made of hot - rolled 1 0 1 8 AISI steel. To reduce

A column 2.7-m long with rounded ends is made of hot-rolled 1018 AISI steel. To reduce the weight, it is suggested that the solid section be replaced with the hollow section shown. Determine (a) the percentage weight reduction, (b) the percent reduction in the critical load and (c) the critical load of the hollow section.
A column 2 . 7 - m long with rounded ends is made

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