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A sprial is made up of successive semici...

A sprial 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 in figure. What is the total length of such a spiral made up of thirteen consecutive semicircles? (Take `pi = 22/7`)
[Hint : Length of successive semicircles is `l_(1), l_(2), l_(3), l_(4),`...... with centres at A, B,A,B, ....., respectively.]

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BEYOND PUBLICATION-PROGRESSIONS-EXERCISE
  1. A sprial is made up of successive semicircles, with centres alternatel...

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  2. For the following A.Ps write the first term and the common difference....

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  3. For the following A.Ps write the first term and the common difference....

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  4. For the following A.Ps write the first term and the common difference....

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  5. For the following A.Ps write the first term and the common difference....

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  6. For the following A.Ps write the first term and the common difference....

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  7. Write the first four terms of the A.P. when the first term 'a' and the...

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  8. Write the first four terms of the A.P. when the first term 'a' and the...

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  9. Write the first four terms of the A.P. when the first term 'a' and the...

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  10. Write the first four terms of the A.P. when the first term 'a' and the...

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  11. Write the first four terms of the A.P. when the first term 'a' and the...

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  12. Which of the following are A.Ps? If they form A.P. find the common dif...

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  13. Which of the following are A.Ps? If they form A.P. find the common dif...

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  14. Which of the following are A.Ps? If they form A.P. find the common dif...

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  15. Which of the following are A.Ps? If they form A.P. find the common dif...

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  16. Which of the following are A.Ps? If they form A.P. find the common dif...

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  17. Which of the following are A.Ps? If they form A.P. find the common dif...

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  18. Find the 30^(th) term of the A.P. 7,11,15,19,….

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  19. Find the 10^(th) term of the A.P: -11,-9,-7,….

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  20. Find the 18^(th) term and 23^(rd) term of the A.P 16,11,6,….

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  21. The first term of an A.P. is -2 and the 10^(th) term is 16. Determine ...

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