Question

I am unable to get the answer to above question can I get the answer?

Answer 1

Answer:

Step-by-step explanation:

a = 0.5

d= 1 - 0.5 '

 = 0.5

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

     = 13/2 (2(0.5) + 12(0.5))

     = 13/2( 1+6)

     = 13/2 x 7

using perimeter of circle = pi x sn

                                           = 22/7  X 13/2 x 7

                                           = 143 cm

mark as brainliest pls