a 7. If the diameter of a circle is 3.5 cm, its circumference would be: a. 11 cm b. 14 cm c. 22 cm d. 16.5 cm
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Answer:
Radius of circle = D/2= 3.5/2= 1.75 cm
Circumference of circle = 2 phi r
= 2 × 22/7 × 1.75
= 11 cm
Hence circumference of circle is 11 cm
option (a) is correct.
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