Elongation in steel and aluminum compound bar/ Change in length/ Simple stress and strain

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Elongation in steel and aluminum compound bar/ Change in length/ Simple stress and strain
A compound bar ABC 1.5 m long is made up of two parts of aluminum and steel and that crosss ectional area of aluminum bar is twice that of the steel bar. The rod is subjected to an axial tensile load of 200 KN. If the elongations of aluminum and steel parts are equal, find the lengths of the two parts of
the compound bar. Take E for steel as 200 GPa and E for aluminum as one-third of E for steel./ Elongation in steel and aluminum compound bar/ Change in length/ Simple stress and strain
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Plz sir again confirm (Ls )= 900 or 9000 ?....

omprakashrath