Question

Neha divides a circular disc of radius 4.2 cm into two equal parts. What is the perimeter of each semicircular disc?​

Answer 1

✪ Given :-

• Radius of the disc = 4.2 cm

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✪ To Find :-

• Perimeter of each disc when divided into two equal parts

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✪ Solution :-

★ Circumference of semicircle = πr + 2r

→ 22/7 + 4.2 + 4.2 + 4.2

→ 22/7 + 12.6

→ 15.74 cm

∴ Perimeter of each disc is 15.74 cm