Select the correct answerA cube has a total surface area of 864 cm². Find the length of one edge of the cube.Options18 cm16 cm12 cm14 cm
Question
Select the correct answerA cube has a total surface area of 864 cm². Find the length of one edge of the cube.Options18 cm16 cm12 cm14 cm
Solution
A cube has 6 equal sides. So, to find the area of one side, we divide the total surface area by 6.
864 cm² ÷ 6 = 144 cm²
The area of one side of a cube is also calculated by squaring the length of one edge. So, to find the length of one edge, we take the square root of the area of one side.
√144 cm = 12 cm
So, the length of one edge of the cube is 12 cm.
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