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If the total surface area of a cube is 726 cm2.Find the curved surface area.
1. 112 cm2
2. 484 cm2
3. 156 cm2
4. 489 cm2

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Correct Answer - Option 2 : 484 cm2

Given

Total surface area of cube = 726 cm2

Formula used 

Total surface area of cube = 6(side)2

Curved surface area of cube = 4(side)2

Calculation

6(side)2= 726

⇒ (Side)2 = 726/6

⇒ (Side)2 = 121

⇒ Side = 11 cm

Curved surface area = 4(11)2

⇒ 4 × 121

⇒ 484 cm2

∴ The curved surface area of a cube is 484 cm2

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