FORMULA=2TTr V=Ab.h
V=25'68.18=385'20m3
A=TTr2=3'14.2'86.2'86=25'68m2
AREA TOTAL =421'36m2
L=18
L = 2TTR
18 = 2.3'14.r
r=18:6'26=2'68m
r=2'68
D=5'72
