隔四米种一棵树,一亩田能种多少棵树

题目

隔四米种一棵树,一亩田能种多少棵树

答案

隔四米种一棵树 ==> 16m^2 种一棵树
一亩田 = (2000/3) m^2
一亩田能种 (2000/3)/16 = 42 棵树