luas lingkaran = 1/4 π d²
= 1/4.3,14.40.40
= 1256 cm²
volume tabung = L ling.t
= 1256.45
= 56520 cm³
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r=d/2=40/2=20 cm
t=45 cm
V=πr²t
V=3,14 × 20 × 20 × 45
V=56.520 cm³
V=56,52 liter
luas lingkaran = 1/4 π d²
= 1/4.3,14.40.40
= 1256 cm²
volume tabung = L ling.t
= 1256.45
= 56520 cm³