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Answer

(a) If the radius of the small circle is u cm, by inspection

44 = 13 + 5*2 + 3u

3u + 23= 44

3u = 21

u = 7

Radius of the small circle is 7cm.

(b) length of a wire structure = 5 *2 + ( 2 * 3.14 * 7)/2 + ( 2 * 3.14 * 12)/2

= 10 + 21.98 + 37.68

= 69.66 cm

Length of wire used = 2 * 69.66 + 13 = 152.32 cm

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Thank you so much 🙏

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