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    				| 1. | Quesion 30Two steel tods and an aluminium rod of equal length h) and equal cross-section are joinenath of the system when the temperature is ralsed to e. Coefficlent of linear expansion ofaluminium and steel are a and as respectively. Young's modulus of aluminium is Ya and of steel ised rigraly atiindi, allihown in the figure below. All the rods are in a state of zero tension at O-C-Find theYasteeAlumiumSteeifigure 23-E1 | 
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