The perimeter of one face of a cube is 20 cm. Find the lateral surface area of the cube. -Maths 9th

The perimeter of one face of a cube is 20 cm. Find the lateral surface area of the cube. -Maths 9th
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Answer :

Let a be the edge of cube, ∴  Perimeter of one face of cube  = 20 cm  ⇒ 4a = 20 ⇒ a = 5  ∴  Lateral surface area of cube  = 4a2 = 4 (5)2 = 100 cm2
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The perimeter of one face of a cube is 20 cm. Find the lateral surface area of the cube. -Maths 9th

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