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If the ratio of lengths, radii and Young...

If the ratio of lengths, radii and Young's moduli of steel and brass wires in the figure are `a, b` and `c` respectively then the corresponding ratio of increase in their lengths is

A

`(3c)/(ab^(2)`

B

`(2a^(2)c)/b`

C

`(3a)/(2b^(2)c`

D

`(2ac)/(2b^(2)`

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