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If the sum of the length, breadth and de...

If the sum of the length, breadth and depth of a cuboid is 20 cm and its diagonal is 4`sqrt5 `cm, then its surface area is

A

`400 cm^(2)`

B

`420 cm^(2)`

C

`300 cm^(2)`

D

`320 cm^(2)`

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The correct Answer is:
D
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