Question

The surface area of a cubical box is 486 cm. Find the length of an edge of this box.


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Answer 1

Answer:

9cm

Step-by-step explanation:

Let a be the side of the cubical box  

Given total surface area of a cubical  box is 486cm  

i.e. 6a ^2=486

⇒a^2=486/6  

⇒a^2 =81

⇒ a=9cm

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Answer 2

Answer:

9cm

Step-by-step explanation:

wkt ,

surface area = 6 * sides

surface area = 486cm

486 = 6 * sides ^ 2

sides^2 = 486/ 6

sides^2 = 81

side = ✓81

side = 9 cm