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r = √(169-144)
r = √25
r = 5
V = 1/3. π . r² . t
V = 1/3. 3,14. 5.5.12
V = 314 cm³
s= 13
t= 12
r= 5 (pake tripple pitagoras)
v = 1/3 x 3,14 x 5 x 5 x 12 = 314 cm (kubik)
jawaban d