Need help i don't know it.
1 answer:
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Answer:
The surface area of the gift box that Kira decorates is
Step-by-step explanation:
see the attached figure to better understand the problem
we know that
A cube has six square faces
The surface area of a cube is equal to the area of the six squares faces
where
b is the length side of a cube
In this problem we have
substitute
hope its helps
Step-by-step explanation:
total area = 99m² + 39.4m²
= 138.4m²
