Answer:
131.25
Step-by-step explanation:
There are 3 trapezoids that you need to find its area, all the areas are the same.
Area of trapezoid:
A=(a+b)/2*h
a = 20
b = 15
h = (20-15)/2 = 5/2
A = (20+15)/2*5/2
A = 43.75
3A (3 gardens) = 131.25
50+50=100
180-100=50
The answer is 40
