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r=2,8 m
t=7,2 m
dit
a) diameter=…?
b) volume=…?
penyelesaian
a) diameter=2,8 × 2=5,6 m
b) volume
=Πr²t
=3,14 × (2,8)² × 7,2
=3,14 ×7,84 × 7,2
=177,25 cm³