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17. Volume Tabung
= L.Alas × Tinggi
= 616 × 50
= 30800 cm³ ----- B
18. s=√r²+t²
s=√16²+30²
s= √256+900
s= √1156
s= 34
L. Selimut Kerucut
= Πrs
= 3,14. 16. 34
= 50,24. 34
= 1708,16 cm² ---- C
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