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//
//
printf("\n case 1')
ir=3.415
fr=4.415
n=0//anchor point outside
c=0
sc=16 //1cm^2=16m^2
h=10000
ag=0.16*h
am=ag/sc
printf("\n A= %0.3f square centimeters",am)
m=am/(fr-ir)
printf("\n M= %0.3f ",m)
printf("\n case 2')
fr_ir=2.25
c=21.22
n=1
a1=m*(fr_ir-10+c)
printf("\n required area is %0.3f square centimeters ",a1)
area=m*c
printf("\n area of zero circle is %0.3f square centimeters",area)
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