The figure at the right shows three circular pipes all with 12inch diameters the have been strapped together by a metal band.What is the lenght of the band?

Question

I don't even know where to start , please help?

Answer 1

The centers of the pipes form an equilateral triangle, with sides of length 24.

The belt then consists of three straight segments of length 24, and three arcs of the circles, subtending angles of 2pi/3.