When it comes to measuring land, precision is important. As declared in a 1959 agreement, which of the following measurements is exactly 4,046.8564224 square meters?

The 1959 "International yard and pound agreement" defined an acre as exactly 4,046.8564224 square meters. This precise measurement replaces the old Middle Ages definition, which was the area of land that could be plowed in one day by a yoke of oxen.

Asked by Tom Cohen · Last updated 5 years ago · 22.4K views · SOURCE