Question

3. The total surface area of a cube is 54 cm? What is the length of its sides ?​

Answer 1

Answer:

Total surface area of cube = 6 ( side )²

∴ 6 ( side )² = 54

⇒ ( side )² = 54 / 6

⇒ ( side )² = 9

⇒ side = √9

⇒ side = 3 cm

Hence, the length of the cube is 3 cm.