Question

LSA of a cube is 216cm^2. Find TSA of a cube

Answer 1

$4a ^{2} = 216 \\ {a}^{2} = 54 \\ a = \sqrt{54 } \\ \: \: \: \: = 3 \sqrt{6} \\ thus \: tsa = 6 {a}^{2} \\ so \: 6 {a}^{2} = 6(3 \sqrt{6})^{2} \\ \: \: \: \: \: = 6(54) \\ \: \: \: \: = 324 \: cm^{2}$
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Answer 2

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