The edge of a cube is increased by 100%, the surface area of the cube is increased by:
A
100%
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B
200%
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C
300%
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D
400%
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Solution
The correct option is C 300% Let edge of a smaller cube be 1 m ∴ Edge of larger cube = 2 m and Surface area of smaller cube =6×(1)2=6m2 ∴ Surface area of larger cube =6×(2)2=24m2 ∴ % increase in surface area =24−66×100=300%