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In the given figure a semicircle is drawn with OS centre and ab as diameter semicircle are drawn with a and ab as diameter if ab is equal to 28 cm find the perimeter of the shaded region

Posted by Ankit Sharma 4 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Yogita Ingle 4 years, 10 months ago

to find the perimeter of the larger hemisphere- 2πr/2 = πr = 44 cm ( radius of larger hemisphere is 14 cm)
perimeters of two smaller hemispheres - 2×2πr /2 = 2πr = 44 cm ( radius of smaller hemispheres is 7 cm )
adding both we get 88cm as perimeter of the shaded region.

0Thank You

King Adithya H M... 4 years, 10 months ago

ANSWER Perimeter of the shaded region=Perimeter of bigger semi-circle+2(Perimeter of smaller semi-circle) =πD+2(πd) =722×14+2(722×7) =44+2×22 =44+44 =88cm

2Thank You

ANSWER

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