Correct Answer - Option 3 : 54 Square Centimeter

**Given:**

Each core of a cube is 3 centimetre

**Formula used:**

Surface area of cube = 6 × side^{2}

**Calculation:**

According to the question,

Side = 3 cm

Surface area of cube = 6 × side^{2}

⇒ 6 × 3^{2}

⇒ 6 × 9

⇒ 54 cm^{2}.

**∴ Its Surface area is 54 cm**^{2}.