Question 57974
this question would fall under word problems,

because there are 3 fields, you can state that all 3 fields =38 when squared,

(3x)^2=38
take the square route of both sides,
3x=6.16

divide both sides by 3
x=2.0

so the smallest field is 2km            4km squared
the middle field is 2+1 or 3km long     9km squared
and the last field is 2+3 or 5km long. 25km squared
the total area when you add your answers is 38km squared