Answers

2015-03-15T12:26:03+05:30
According to question, the wire is in shape of semicircle. So the length of wire is equal to the perimeter of semicircle.

Therefore, length of wire = (1/2 x 2 x 22/7 x 7) + 2r  (2r is added because the perimeter semicircle also contains the diameter) 
= 22 + 14
= 36 cm

Hope that helps !!
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2015-03-15T12:27:31+05:30
given that  : -

r =  7 cms
 l = ?
length =  1/2 x 2 x 22/7 x 7
         l = 22 cms

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