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no 8 yang DOC
no 10 yang 188,44
9. V = 1/3 x πr² x t
314 = 1/2 x 3,14 x 5 x 5 x t
100 = 1/2 x 5 x5 x t
200 = 25t
t = 8
garis pelukis = √t²+r²
= √8²+5²
= √64+25
= √..........
(hitung sendiri, ya)