Question

A piece of wire is bent in the shape of a square of each side 6.6 cm. It is rebent to form a circular ring. What is the diameter of the ring?

[Hint: Perimeter of square =Circumference of circular ring, i.e., r×d =4×6.6]


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Answer 1

Answer:

8.4cm is the diameter of the ring

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Answer 2

Answer:

8.4 cm

Step-by-step explanation:

the perimeter of the square is = 4 × s

                                = 6.6 × 4                                  

the formula for circumference of the circle = $2 \pi r$

since the wire is being rebent the length of the wire will be the same:
2 × r = d

∴ Circumference = π × d = 26.4

                        = $\frac{22}{7} X d = 26.4\\ d = \frac{7 X 26.4}{22}$

∴ d = 7 × 1.2 = 8.4 cm