Question

a copper wire of length 2.2m & steel wire of length 1.6m both of whose diameter are 3.0mm are tied at end. when it was streched by a weight then the total increase was 0.7mm .Calculate the value of the applied weight?

Answer 1

By composite we mean the two wires are joined end-to-end

Then we have to calculate the overall extension

complete  answer: (image)