Answers

2014-03-18T16:34:26+05:30
Perimeter of circle = 2 \pi r
Perimeter of semicircle =  \pi r
= (22/7)*42(where pi = 22/7)
= 22*6
= 132cm
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2014-03-18T16:35:06+05:30
Formulae for perimeter of semi circle  \pi r+2r=pi(42)+2(42)=42pi+44=42*22/7+44=216
216 is the answer.
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