What is the perimeter of a rhombus having side as $20$ cm?

20

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40

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60

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80

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Solution

The correct option is D $80$ cm
Perimeter of the rhombus $= 4 a$
Where $a =$ one side length of a rhombus
Therefore, perimeter of a rhombus $= 4 \times 20 = 80$ cm.

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