If each edge of a cube is doubled, then by how many times will its surface area increase?
A
24 times
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B
2 times
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C
6 times
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D
4 times
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Solution
The correct option is D 4 times Let x be the side length of the cube. Then, its total surface area =6x2 Increased length of the edge =2x New total surface area =6(2x)2 =24x2 =4(6x2) i.e., New TSA = 4 × Original TSA Hence the answer.