Question

the volume of a cubical box whose surface area is486cm2​

Answer 1

Answer:

729 cm³

Step-by-step explanation:

Surface area = 6a² = 486 cm²

(where a = side of square)

=> a² = 81

=> a = 9 cm

Now volume of a cube is (side)³

V = a³ = 9³ = 729 cm³

Answer 2

Answer:

Step-by-step explanation:

→ Edge = a

→ Surface area = 6a² = 486 cm²

= 6a² = 486 cm²

= a² = 486 /6

= a² = 81

= a = √81

= a = 9 cm

= Edge = a = 9 cm

= Volume = a³ = 9³ = 729 cm³