有一个占地1公顷的正方形果园，如果它的边各延长200米，那么果园的面积增加多少公顷？
人气：390 ℃ 时间：2019-10-10 01:08:05
解答
1公顷=10000平方米
则原正方形的边长是100米
（100+200）×（100+200）-10000
=90000-10000
=80000（平方米）
80000平方米=8公顷
答：果园的面积增加8公顷．
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