Question

Aspiral is made up of successive semicircles, with
centres alemately at A and B. starting with centre
at A. of radi 05 cm, 1.0 cm. 1.5 cm, 2.0 cm.....
as shown in Fig. 5.4. What is the total length of
such a spiral made up of thirteen consecutive
AB
semicircles2 Take (22/7)

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Answer 1

Answer:

sn=n/2( 2a+(n-1)d)

=13/2(2×0.5+(13-1)0.5

=13/2(1+6)

=13/2(7)

=13/2(7)(22/7). pie value

=143

Answer 2

ur answer in above attachment

Step-by-step explanation:

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