Calculate the sum of the lengths of all edges of a cube if the sum of the areas of all its faces is 216 cm2.
| December 16, 2020 | education
1) 216: 6 = 36 (cm²) – area of one cube faces
2) 36cm² = (6cm) ² – the length of one edge
3) 6 * 12 = 72 (cm) – the length of all edges of the cube
Answer: 72cm.
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