aiyahakiya aiyahakiya

22-09-2016
Mathematics

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A contractor has installed a silt fence around an area that is semi-circular and level to prevent soil from the construction site entering nearby streams. The diameter of the semi-circle is 1200 feet. How many linear feet of fence does the contractor need to use to enclose the area?

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nobillionaireNobley nobillionaireNobley

22-09-2016

Required length is pi x d/2 = 1200/2 x pi = 600 pi feet = 1,885 feet.

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