Each side of a rectangular field is diminished by 40%. By how much percent is the area of the field diminished ?
Each side of a rectangular field is diminished by 40%. By how much percent is the area of the field diminished ? Correct Answer 64%
By using successive formulaNet decrease in area
$$\eqalign{ & = 40 + 40 - \frac{{40 \times 40}}{{100}} \cr & = 64\% \cr} $$
