无语.i hope you will help me.药草种植专业户张伯去年种植了茵陈,亩产量为200千克,每千克售价为15元,今年改良药种,使亩产量提高了40千克,每千克售价上升了5元,这样,张伯在种植面积减少了10亩的

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无语.i hope you will help me.药草种植专业户张伯去年种植了茵陈,亩产量为200千克,每千克售价为15元,今年改良药种,使亩产量提高了40千克,每千克售价上升了5元,这样,张伯在种植面积减少了10亩的
无语.i hope you will help me.
药草种植专业户张伯去年种植了茵陈,亩产量为200千克,每千克售价为15元,今年改良药种,使亩产量提高了40千克,每千克售价上升了5元,这样,张伯在种植面积减少了10亩的情况下,依然使总收入提高了10%,求张伯去年种植茵陈的面积.

无语.i hope you will help me.药草种植专业户张伯去年种植了茵陈,亩产量为200千克,每千克售价为15元,今年改良药种,使亩产量提高了40千克,每千克售价上升了5元,这样,张伯在种植面积减少了10亩的
设去年种了X亩,由于总收入提高了10%,即今年总收入是去年的（100+10）%
x*200*15*(100+10)%=（x-10）*（200+40）*（15+5）
解得X=32亩

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