Yes, but a penis of that size is extremely uncommon, and not desireable since it makes intercourse very difficult and painful for the receptive partner.
two feet
a ruler
A stick measuring 99.8 cm
30 feet = 914.4 cm
30 what cm's? 30 cm is 300 mm
5x6x2 = 60 cubic cm
as long as its penis in cm multiplied by 5
30 cm
Volume cannot be measured in cm since that is a unit for measuring length.
use a calculator
It ranges between 40 cm to 60 cm as the norm. (15.5"-23.5")
about a foot