In an electrical cable there is a single...

In an electrical cable there is a single wire of radius `9 mm` of copper. Its resistance is `5 Omega`. The cable is replaced by 6 different insulated copper, wires the radius of each wire is `3 mm`. Now the total resistance of the cable will be

A

`7.5 Omega`

B

`45 Omega`

C

`90 Omega`

D

`270 Omega`

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The correct Answer is:

A

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