Question

find the circumference of circle with radius 15.4 cm and the perimeter of two semicircle with the same radius​

Answer 1

Let radius =15.4cm

currently=2π r = 2×π×15.4

=30.8π.

it is not possible that two semi circle have same radius.

hope it is helpful to you.

Answer 2

Answer:

The circumference of circle=2πr

2×22/7×15.4

484/5

96.8cm

The perimeter of 2 semi circle=2(πr+2r)

2(22/7×15.4+2×15.4)

2(79.2)

158.4cm

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