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The masses of the three wires of Copper ...

The masses of the three wires of Copper are in the ratio 5:3:1 and their lengths are in the ratio 1:3:5. The ratio of their electrical resistances is ......

A

`5:3:1`

B

`sqrt(125) : 15:1`

C

`1:15:125`

D

`1:3:5`

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