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10 cm

10 cm
7 cm
13 cm
10 cm
10 cm
What is the surface area of the right rectangul
7 cm

10 cm 10 cm 7 cm 13 cm 10 cm 10 cm What is the surface area of the right rectangul-example-1

1 Answer

4 votes

Answer:

582 cm²

Explanation:

You want the area of the figure represented by the given net.

Area

The surface area of the cuboid is the sum of the areas of the rectangles shown in its net. Working top down and left to right, that sum is ...

A = ∑LW

A = (13)(10) +(10)(7) +(13)(7) +(10)(7) +(13)(10) +(13)(7)

A = 2(13(10) +10(7) +13(7)) = 2(130 +70 +91) = 2·291 = 582

The surface area of the right rectangular prism is 582 square centimeters.

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Additional comment

The formula can be shortened to ...

A = 2(LW +H(L +W))

A = 2(13·10 +7(13 +10)) = 2(130 +161) = 582

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