Answer:
4feet
Step-by-step explanation:
Area of the trapezoid = 1/2(a+b)h
a and b are the sides
h is the height
Substitute the given values
Area of the trapezoid = 1/2(8+b)*4
24 = 1/2(8+b)*4
2(24) = (8+b) * 4
48 = 32 + 4b
4b = 48-32
4b = 16
b = 16/4
b = 4feet
Hence the window on top is 4feet wide
