Answer:
The height = 13 1/3 m.
Step-by-step explanation:
The area = (h/2)(a + b) where a and b are the bases and h = the height.
So we have the equation:
400 = (h/2)(15 + 45)
h/2 = 400 / (45+15)
h/2 = 400/60
h / 2 = 20/3
3h = 40
h = 40/3
h = 13 1/3 m.
