Question

A 44cm long wire is used to make a ring.What is a diameter of a ring?

Answer 1

Which means

$2\pi \: r \: = \: 44 \\ \\ 2 \times \frac{22}{7} \times r = 44 \\ \\ r \: = 7 \\ diameter = 14cm$

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Answer 2

Circumference of ring = 44cm

$2\pi \: r = 44 \: cm$
r= 44×7/22×2
r=7cm
d=2r
d=14cm

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