Mathematics
If the perimeter of one face of a cube is 40 cm, then the sum of lengths of its edge is
80 cm
120 cm
160 cm
240 cm
Mensuration
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Answer
Each face of cube is a square. Let length of each side = x cm.
Given, perimeter = 40 cm.
∴ 4x = 40 cm
⇒ x = 10 cm.
There are 12 edges in a cube.
Sum of edges = 12 × 10 = 120 cm.
Hence, Option 2 is the correct option.
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