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Q.

Find the surface area of a cubical box whose one side is 80cm.

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a

Question Image

b

Question Image

c

Question Image

d

Question Image 

answer is B.

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Detailed Solution

Given side of a cubical box is 80cm. We know that a cubical box has six faces. Which are in square shape.
area of a square is given as: side×side
Area of one square face of a cubical box is = 80×80
Area of one square face of a cubical box is = Question Image surface area can be calculated by multiplying the above area of a square face by 6
Question Image we see that area a cubical box is Question ImageSo, Option 2 is correct.
 
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