50.........................
Since the formula for the base of the cylinder is

, multiplying that by 10 we get

. Hope this helps!
I’m pretty sure there are infinite solutions as the system of equations are equivalent to each other.
Answer:
z=6
Step-by-step explanation:
z/3 + 1/2 = 5/2
Subtract 1/2 from each side
z/3 + 1/2-1/2 = 5/2-1/2
z/3 = 4/2
z/3 =2
Multiply each side by 3
z/3*3 = 2*3
z = 6