Question

How much cordboard is needed to make a rectangular box of length
25cm breadth 12.5cm and 8 cm high
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Answer 1

I think that your question is incomplete.

Because you didn't wrote the length of cardboard (used).

But if you have a nice piece of cardboard 1 is sufficient.

hope it helps...

Answer 2

Answer:

mostly a cardboard is of 30 cm in length therefore 1 cardboard is needed for making a box of length 25cm breath