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09-09-2017
Mathematics

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the circumference of a coin is 20π cm what is the radius? what is the diameter?

Respuesta :

09-09-2017

Circumference of a coin = 2πr
Given circumference = 20π cm
⇒ 2πr = 20π
⇒ r = 10 cm
Therefore, diameter = 20 cm.

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