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A copper wire and an aluminium wire have...

A copper wire and an aluminium wire have lengths in the ratio 5:2 diameters in the ratio 4:3 and forces applied in the ratio 4:5. Find the ratio of increase in length of the copper wire to that aluminium wier. (Let `Y_(Cu)=1.1xx10^(11)Nm^(-2),Y_(Al)=0.7xx10^(11)Nm^(-2)`)

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