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Volume paralon = πr²
= 22/7 . 21²
= 22/7 . 441
= 22 . 63
= 1386 dm³
Volume air = 1/2 . 1386
= 693 dm³ atau 0,693 m³
r = 21dm
volume 1/2nya air didalam paralon adalah
volume 1/2 =1/2 x luas alas x tinggi = 1/2 x 22/7 x 21dm x 21dm x 100dm = 69300dm³