Answers

  • qais
  • Content Quality
2015-12-09T11:27:30+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
We have to find the inside distance and outside distance.
for inside distance , radius = 140/2 =70 m
length of circumference =2π×radius
                                       =2×(22/7)×70
                                       =440 m
now, outside distance 
radius = 70 +7 = 77 m
length of circumference = 2π× radius
                                       = 2×(22/7)×77
                                       = 484 m
total length = 440 +484 =924 m
cost = Rs 7× 924 = Rs 6468
1 5 1