height
h
40
slope
m

20
.
answer
open
frustum
2
π
turns
n
5
approximate
length
of
ribbon
=
74
.
673
feet
exact
length
of
ribbon
=
75
.
194
feet
lateral
area
of
frustum
=
503
.
283
feet
2
volume
of
frustum
=
544
.
543
feet
3
1
.
00
π
ft
3
π
ft
40
ft