Asked by Sara

Amazon wants to know the smallest amount of cardboard they can use to make a box for shipping a new picture book. The book is 21 cm long, 19 cm wide, and 1 cm high. Find the surface area to find the amount of cardboard needed.

Answers

Answered by PsyDAG
2(21*19) + 2(21*1) + 2(19*1) = ?
Answered by Sara
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