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18. A spiral is made up of successive semicircles, with centres alternately at A and Bstarting with centre at A. of radii 0.5 cm. 1.0 cm. 1.5 cm. 20 cm.... as shown inFig. 5.4. What is the total length of such a spiral made up of thirteen consecutivesemicircles? (Take 22 |
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Answer» answer = 143 cm Step-by-step explanation: |
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