Quarter circular

The wire hooked around the perimeter of the quarter-circular arc has a length of 5π+20. Determine the radius of the circle arc.

Correct answer:

r =  10

Step-by-step explanation:

 5 π + 20=  4 2 π r + 2r  r =  π +4  2  (5 π +20)  r = 2   5   π +4  π +4   r=2 5=10



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