hello
to solve this question, we have to understand that a soccer field is rectangular in shape and we can find this length from factoring the area
formula of area of a rectangle


we can proceed to solve this by dividing the polynomial or simply checking it from the options
from the options given,
we have option A
3x + 10
let's multiply both the L and W to see if it gives us the answer

option A is incorrect
let's test for option B
L= 6x + 10

option B is correct
let's test for option C
L= 6x + 1

option C is also incorrect and so it'll be for option D
from the calculations above, only option B corresponds with the value of length for the soccer field