Question

19.
18. A spiral is made up of successive
semicircles, with centres alternately at
A and B, starting with centre at A, of
radii 0.5 em, 1.0 cm, 1.5 cm, 2.0 em, ...
as shown in Fig. 5.4. What is the total
length of such a spiral made up of
thirteen consecutive semicircles?
Sol.
22
Take =
7
---
А в
[Hint : length of successive semicircles is
LL, L, L. with centres at A.B.AB
resply) in writing from​

Answer 1

Answer:

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Answer 2

Answer:

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