(Pi* r^2) = the area of the circle, or cross section
= 201.06
Multiply by the height for volume, *12
= 2412.74 -- this is the total volume
now *2/3 to get the answer
=1608.5
I dont know what the units are, they aren't given
as tiers increases, sales increases
since there seems to be no assemtote (horizontal or vertical), As the number of cake tiers increases without bound, the total monthly sales increase without bound.
answer is 3rd option