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If the length of diagonal of a cube is `8 sqrt3`cm then its surface area is

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If the length of diagonal of a cube is `8 sqrt3`cm then its surface area is
A. `192 cm^(2)`
B. `384 cm^(2)`
C. `512 cm^(2)`
D. `768 cm^(2)`
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1 Answer

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Correct Answer - B
`sqrt3 a = 8 sqrt3 rArr a = 8 cm`
`:.` its surface area `= 6a^(2) = (6 xx 8 xx 8) cm^(2) = 384 cm^(2)`
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