Rob and mike each have the same size sandwiches rob cut his sandwich into 3 equal parts and ate 2 part mike cut his sandwich into 4 equalparts and ate 2 part who ate more explain your answer

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