Question

find the radius of a circle whose circumference is 17.6 cm

Answer 1

$circumference = 2\pi \: r$
$17.6 = 2\pi \: r$
$17.6 = 2 \times \frac{22}{7} \times r$
$r = \frac{17.6 \times 7}{2 \times 22} = \frac{28}{10} = 2.8$
hence radius =2.8 cm

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Answer 2

Circumference = 17.6 cm
2 π r = 17.6
r = 17.6* 7/44
r = 2.8 cm


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