Answer:
C
Step-by-step explanation:
The volume formula for a cylinder is A = πr²h where A, r, and h are area, radius, and height respectively. The radius is 1/2 the diameter which is 7 / 2 = 3.5. We are solving for h so we can write:
385 = 22/7 * (3.5)² * h
385 = 38.5 * h
h = 10
