Dorian 8-14 TSA continue

r=d/2
r=8/2
r=4mm
c=pi d
c=3.14x8
c=25.12
LxW
12.25.12= 301.44mm
a=pi r2
a=3.14x42
a=3.14x16
a=50.24mm2
TSA=301.44+50.24+50.24
TSA=401.92mm2