Question

A cube-shaped item needs to be painted. The item’s edge length is 2 centimeters. What is the total surface area that will be painted? 16 cm² 24 cm² 32 cm² 48 cm²

Answer 1

Since you're painting the sides of the cube, you will need the equation for the surface area of a cube, which is
`SA = 6s^(2)`, where SA = surface area and s = length of an edge of the cube.

You're told that the edge length, s = 2cm. Plug this into the equation for surface area:

`SA = 6s^(2)\\ SA = 6 (2\:cm)^(2) \\ SA = 6 (4\:cm^(2) )\\ SA = 24 \:cm^(2)`

The surface area that will be painted is 24 cm².

Answer 2

The correct answer is: [B]: " 24 cm² " .
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Formula for the "Surface Area", "A" , of a cube:

A = 6 a² ;

in which "a" = edge length = " 2 cm " .
A = 6 * (2 cm)²

A = 6 * 2² * cm² ;

A = 6 * 4 * cm² ;
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→ A = 24 cm² ; which is: Answer choice: [B]: " 24 cm² " .
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