A spiral is made up of successive semicircles, with centres alternatel – InterviewSolution

1.	A spiral is made up of successive semicircles, with centres alternately at A and B,starting with centre at A, of radii 0.5 cm, 1.0 cm, 1.5 cm, 2.0 cm,... as shown inFig. 5.4. What is the total length of such a spiral made up of thirteen consecutive-semicircles? (Take π =)7
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