SOLUTION: four pencils are held together in a square by an elastic band if the pencils are of diameter 7mm what is the length of the band in this position

Question 1116600: four pencils are held together in a square by an elastic band if the pencils are of diameter 7mm what is the length of the band in this position
Answer by ikleyn(52781) (Show Source): You can put this solution on YOUR website!
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The length of the band = 4 times the distance between the centers of adjacent pencils (4 times 7 mm)   PLUS 

                         4 times the length of the 90� arc of the circle of the radius 3.5 mm (4 times  mm) :


The length of the band = 4*7 + 4*(1/4)*(2*3.14*3.5) mm = 4*7 + 2*3.14*3.5 mm = 49.98 mm.

Solved.

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