If each side of a cube is reduced by 50%, the surface area will reduced by.
Explanation:
Let the initial side of the cube be 2 cm. ∴ Total surface area initially = 6 × 22 = 24 cm2.
Now the new side of the cube is 1 cm. ∴ Total surface area now = 6 × 12 = 6 cm2.
⇒ % change in total surface area = (24 - 6)/24 × 100% = 75%
Hence, option (a).
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