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3 years ago

A cube has a side length of 20.5 cm .what is the surface area of the cube?

Mathematics

2 answers:

valentinak56 [21]3 years ago

7 0

Answer:

2521.5 cm²

Step-by-step explanation:

A cube has 6 equal, square sides.

If the side length is 20.5 cm, then the area of one side is (20.5 cm)², or 420.25 cm².

The total surface area of the cube is thus 6(420.25 cm²) = 2521.5 cm²

Nitella [24]3 years ago

6 0

To sum up, we only have the length of one side.

We need to find the width of the same side. -

20.5 x 20.5 = 420.25

To get the surface area, we multiply by six.

<u>Why?</u> There are six sides on a cube.

420.25 x 6 = 2521.5

Answer: 2521.5 cm

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3 years ago

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