Mechanics of Materials - Statically indeterminate axially loaded members example 1

Mechanics of Materials
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[@engandzafils]

Amazing explanations !

[@mdmominulislam7348]

Excellent job

[@AliyahMaxwell-Abrams]

isnt the gap at be so dL at be is .1 m... and isnt dL ab = dL cf and dL be is .1

[@blackeagle4827]

this is what ı tought did you handle the problem