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Answer :
Final answer:
The circumference of the circle is approximately 62.8 cm.
Therefore, the correct answer is: option D).62.8 cm
Explanation:
To find the circumference of a circle, we can use the formula:
C = 2πr, where C is the circumference and r is the radius.
In this case, the longest chord of the circle is given as 20 cm.
Since the chord is twice the length of the radius, we can divide 20 cm by 2 to find the radius.
Radius = 10 cm. Now, substituting the value of the radius into the formula, we get:
C = 2π(10).
Using the value of π as 3.14, we can calculate the circumference as C = 20π cm, which is approximately 62.8 cm.
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Rewritten by : Jeany
