Question 993841
Best to try to break the steps into each trip around for the first mower/landscaper.


24 inches is 2 feet.
Trip 1 mows leaves unmowed {{{(100-2*2)(200-2*2)}}}
Trip 2 leaves unmowed  {{{(100-2*2-2*2)(200-2*2-2*2)}}}
Trip 3 leaves unmowed  {{{(100-2*2-2*2-2*2)(200-2*2-2*2-2*2)}}}
Trip n leaves unmowed  {{{(100-n*2^2)(200-n*2^2)}}}, according to the developing pattern.


HALF the lawn's area is  {{{100*200/2=100*100=10000}}}.


How many trips around, n, will leave an unmowed area of 10000?
{{{(100-n*2^2)(200-n*2^2)=10000}}}
and this would hopefully show a solved value for n to be a whole number.