Question

1. edges of cube are find total surface area, Lateral surface area and volme of cube
a. 12 cm
b. 9 cm. ​

Answer 1

Answer:

b ) . is right

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Answer 2

Step-by-step explanation:

We know,

• Total surface area of cube = 6 a²

• Lateral surface area of cube = 4 a²

• Volume of cube = a³

Where, a is edge of cube.

a. 12 cm

⇒ Total surface area = 6 × (12)²

⇒ Total surface area = 6 × 144

⇒ Total surface area = 864

Total surface area of cube is 864 cm².

⇒ Lateral surface area = 4 × (12)²

⇒ Lateral surface area = 4 × 144

⇒ Lateral surface area = 576

Lateral surface area of cube is 576 cm².

⇒ Volume = (12)³

⇒Volume = 1728

Volume of cube is 1728 cm³.

b. 9 cm

⇒ Total surface area = 6 × (9)²

⇒ Total surface area = 6 × 81

⇒ Total surface area = 486

Total surface area of cube is 486 cm².

⇒ Lateral surface area = 4 × (9)²

⇒ Lateral surface area = 4 × 81

⇒ Lateral surface area = 324

Lateral surface area of cube is 324 cm².

⇒ Volume = (9)³

⇒ Volume = 729

Volume of cube is 729 cm³.