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Two wires of the same metal have the sam...

Two wires of the same metal have the same length, but their cross-sections are in the ratio of 3:1. They are joined in series. The resistance of the thicker wire is `10 Omega`. The total resistance of the combinations will be

A

`5//2Omega`

B

`40//3Omega`

C

`40 Omega`

D

`100 Omega`

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