Question

The amount of cardboard available is 320square cm What should be the length of the side chosen in order to make a cubical box made up of cardboard without a lid



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Answer 1

Answer:

the answer is 8 cm

Step-by-step explanation:

since since we have to make a cubical box without a lid so the formula for its total surface area will be 5a^2

where 'a' is the length of the side of the cubical box.

total area of of cardboard available will be equal to the total surface area of the cubical box.

therefore,

5a^2=320

a^2=64

a=√64=8

therefore, 'a' that is the side length of the cubical box will be 8cm

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