An official playing field​ (including end​ zones) for the Indoor Football League has a length 42 yd longer than its width. The perimeter of the rectangular field is 168 yd. Find the length and width of the field.

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min