Question

Sudhanshu divides a circular disc of radius 7 cm in two equal parts. What is the perimeter of each semicircular shape disc? (USE π=22/7 )

Answer 1

Answer:

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Answer 2

Answer:

36 cm.

Step-by-step explanation:

In the given question,

We have a circular disc. The disc has been divided into two equal parts that is the disc is divided into two parts about their diameter.

The radius of the circular disc, r = 7 cm

Also,

We know that

Perimeter of circle is given by, P = 2πr

where,

r = Radius of the circle.

Therefore, on dividing the disc into two halves the disc that we have, will have additional diameter added into the perimeter.

So,

Perimeter of the each semicircular shape disc = πr + 2r

Perimeter = $(\frac{22}{7}\times 7) + 2(7)=22+14=36cm$

Therefore, the perimeter of the each semicircular disc is = 36 cm.