Question

Find the perimeter of the semi-circular disc of radius 10.5cm

Answer 1

Perimeter of semi - circular park=(pi×r)+(2r)
=(22/7×10.5)+(2×10.5)
=33cm+21cm=54cm
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Answer 2

The perimeter of the semi-circular disc of radius 10.5 cm is 54 cm

Step-by-step explanation:

Radius of circle = 10.5 cm

Perimeter of semicircle =$\pi r +2r$

                                      =$\frac{22}{7} \times 10.5 + 2(10.5)$

                                     = 54 cm

Hence  the perimeter of the semi-circular disc of radius 10.5 cm is 54 cm

#Learn more:

Find the perimeter of semi circular plate of radius 3.85 cm .

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