HELP PLS! After u find the length of P explain the reasoning you used and I’ll give u brainliest!!

Answer:
30 yd
Step-by-step explanation:
First find the area of the current parking lot:
(20X10)-(4x5)=
200-20=180 yd²
We know the new part is 10-4 yards wide, so 6.
180÷6=30yd
So the length of P is 30 yd.