Question

taking pi as 3.14 find the circumference of a circle whose radius is 15cm

Answer 1

$2\pi \: r$
$2 \times 3.14 \times 15$
$94.2$

Answer 2

circumference of a circle is 2πr
so
circumference = 2*3.14*15
circumference = 94.2 cm

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