Calculate a circumference of circle — task. Mathematics State Board, Class 7.

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Consider a tire consist of 21

$cm$ in diameter. Calculate the circumference of the tire if

$π\$

$=$

$3.14$ .

Circumference of the tire is ________

$cm$ .

62
75
66
71

[Note: Round off the circumference and select the answer.]

$1$

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