Question : The difference between the total surface area and the lateral surface area of a cube of side 12 cm is:
Option 1: 292 cm2
Option 2: 290 cm2
Option 3: 288 cm2
Option 4: 286 cm2
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Correct Answer: 288 cm 2
Solution : Given: Side of the cube = 12 cm. Difference = total surface area – lateral surface area = $6a^{2}-4a^{2}$ = $2a^{2}$ Putting the value of $a$, we have, = $2×12^{2}$ = 288 cm 2 Hence, the correct answer is 288 cm 2 .
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