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Home > PC > Chapter 6 > Lesson 6.4.1 > Problem 6-147

6-147.

Label the drawing!

Line AB = 100 because it is the sum of the radii of both logs.

Then cosθ = 0.6, so θ ≈ 0.927 radians. Thus the wire length around the large log is 80(2π– 2(0.927)) = 354.287 cm.