Question

Find the diameter of circle whose circumference is 26.4cm

Answer 1

circumference = 26.4 cm

$2\pi \: r = 26.4$
2 * 22/ 7 r = 26.4
r = 26.4 * 7 / 22 * 1/ 2
r = 4.2 cm

we know that diameter = 2 r
= 2 * 4.2
= 8.4 cm
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