Jawaban:
12.
V : 800phi
t : 8cm
V = π r²t
800π = π r² 8
r²= 100
r= 10
d= 2r = 2.10 =20
13.
d= 18/2= 9
t = 10
V = 1/3 πr²t
V= 1/3 π 9² 10
V : 1/3 π 810
v : 270π
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Jawaban:
12.
V : 800phi
t : 8cm
V = π r²t
800π = π r² 8
r²= 100
r= 10
d= 2r = 2.10 =20
13.
d= 18/2= 9
t = 10
V = 1/3 πr²t
V= 1/3 π 9² 10
V : 1/3 π 810
v : 270π