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25-11-2017
Mathematics

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Delilah wants to fence in an area of land in which to keep chickens. She buys 31 feet of fencing to enclose a circular area. If 9 square feet will support one chicken, what is the greatest number of chickens Delilah can keep enclosed in the fenced-in area?

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MantoMa MantoMa

25-11-2017

suppose r is the radius.
2 π r =31. then we get r = 4.93
so the area of the circle is πr^2=76.36
in the end ,76.36÷9=8.48≈8
the answer is 8

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