Final answer:
The diameter of the circle is approximately 6.37cm.
Step-by-step explanation:
To find the diameter of a circle, we can use the formula: diameter = circumference / π. Given that the circumference is 20cm, we can substitute it into the formula to find the diameter. Using the value of π as approximately 3.14, we can calculate: diameter = 20cm / 3.14 ≈ 6.37cm. Therefore, the diameter of the circle is approximately 6.37cm.
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