Question

Length of tape required to cover the edges of a semicircular disc of radius 10 cm is
i. 62.8 cm ii. 51.4 cm iii. 31.4 cm iv. 15.7 cm
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Answer 1

length of tape required to cover the edges of semicircular disc of radius 10cm=1/2 x 2πr

length of tape required to cover the edges of semicircular disc of radius 10cm=1/2 x 2πr1/2 x 2 x 3.14 x 10 = 51.4 cm

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Answer 2

ans 3

we know that area of circle is 2πr

so there is semi circle so it will be πr

length of tape requeried to cover the semi crcular edge= πr

given= r = 10

= 3.14×10.

= 31.40