What is the sq ft of a silo 12 ft round by 55 ft tall?
There is no sensible answer to this question. A square foot is a
measure of area, with dimensions [L2]. However, the dimensions of
the silo are those of a volume [12 feet round by 55 ft tall], with
dimensions [L3]. Basic dimensional analysis teaches that you cannot
convert between measures with different dimensions without
additional information.