Rates 13 feet in 5 steps

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field

See attachment below and find the equivalent of tan(∠qsr)

How many square inches are in 60 square feet?