A container has a 1\times 1 square bottom, a 3\times 3 open square top, and four congruent trapezoidal sides, as shown. Starting when the container is empty, a hose that runs water at a constant rate takes 35 minutes to fill the container up to the midline of the trapezoids.
How many more minutes will it take to fill the remainder of the container?
Answer Choices:
A. 70
B. 85
C. 90
D. 95
E. 105