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英语翻译A rectangular play area is to be fenced off in a person'

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英语翻译
A rectangular play area is to be fenced off in a person's yard and is contain 48yd2.the neighbor agrees to pay half the cost of the fence on the side of the play area that lines the lot.What dimensions will minimize the const of the fence?
某人的院子里要围成一个48平方码的矩形游戏场地.邻居同意对游戏场地两家共同的围墙付一半的费用.怎样做才能使围墙的费用最小?(即长和宽各为多少时,围墙的费用最小?)